[GeoffR]

I don't have a Clara and haven't been keeping up with developments. From what I read here there is no official download link for this firmware, and it is only being distributed to the new Clara devices.

I haven't done all the patches yet, but here are some -- not tested.-- for the firmware linked to in geek1011's post in the Clara discussion thread.

`My 24 line spacing values` (libnickel.so.1.0.0):

Spoiler:

<Patch>
patch_name = `My 24 line spacing values`
patch_enable = `no`
# patch_group = `Line spacing values alternatives`
#
## This patch changes the values on the line spacing adjustment slider,
## increasing the number of spacing options from 15 to 24, and allowing
## much narrower spacing values to be set.
#
# save r5, initialise loop counter
replace_bytes = 6562AC, BD F5 B2 EF 6D A3, A9 46 00 25 ED 00
# loop to load 14 vals from new table
replace_bytes = 6562B2, D3 E9 00 23 07 F1, 20 46 04 A1 29 44
replace_bytes = 6562B8, 80 01 20 46, BD F5 AC EF
replace_bytes = 6562BC, 61 E9 1C 23 BD F5, 08 35 70 2D F7 D1
# jump over new table
replace_bytes = 6562C2, A8 EF 6A A3 D3 E9, 7C E0 00 BF 00 BF
# new table: 14 8-aligned doubles
base_address = 6562C8
replace_bytes = 0000, 00 23 07 F1 80 01 20 46, 00 00 00 00 00 00 F0 3F
replace_bytes = 0008, 61 E9 1A 23 BD F5 9E EF, 00 00 00 00 00 00 F0 3F
replace_bytes = 0010, 67 A3 D3 E9 00 23 07 F1, 00 00 00 00 00 00 F0 3F
replace_bytes = 0018, 80 01 20 46 61 E9 18 23, 00 00 00 00 00 00 F0 3F
replace_bytes = 0020, BD F5 94 EF 43 F2 33 33, 00 00 00 00 00 00 F0 3F
replace_bytes = 0028, 4F F0 33 32 C3 F6 F3 73, 00 00 00 00 00 00 F0 3F
replace_bytes = 0030, 07 F1 80 01 20 46 61 E9, 00 00 00 00 00 00 F0 3F
replace_bytes = 0038, 16 23 BD F5 88 EF 5E A3, 00 00 00 00 00 00 F0 3F
replace_bytes = 0040, D3 E9 00 23 07 F1 80 01, 00 00 00 00 00 00 F0 3F
replace_bytes = 0048, 20 46 61 E9 14 23 BD F5, 00 00 00 00 00 00 F0 3F
replace_bytes = 0050, 7E EF 00 23 00 22 C3 F6, 00 00 00 00 00 00 F0 3F
replace_bytes = 0058, F8 73 07 F1 80 01 20 46, 00 00 00 00 00 00 F0 3F
replace_bytes = 0060, 61 E9 12 23 BD F5 72 EF, 00 00 00 00 00 00 F0 3F
replace_bytes = 0068, 55 A3 D3 E9 00 23 07 F1, 00 00 00 00 00 00 F0 3F
base_address = 00000000
# initialise loop counter
replace_bytes = 6563BC, 00 23 00 22, 00 BF 00 25
# loop to load 10 vals from old table
replace_bytes = 6563C0, C4 F2 08 03 07 F1, 20 46 29 A1 29 44
replace_bytes = 6563C6, 80 01 20 46, BD F5 26 EF
replace_bytes = 6563CA, 61 E9 02 23 BD F5, 08 35 50 2D F7 D1
# restore r5
replace_bytes = 6563D0, 22 EF, 4D 46
# continue at 6563D2
#
#
# Replacement value: the number of initial line spacing values to exclude from
# the line spacing slider; minimum 0, maximum 13. E.g. 9 will result in a
# slider with 15 positions, starting from the 10th replace_float value below.
replace_int = 6562AE, 0, 0
#
# 24 replacement line spacing values: change these replace_float values to suit
# your device and preferences:
#
base_address = 6562C8
replace_float = 0000, 1.0, 0.75
replace_float = 0008, 1.0, 0.78
replace_float = 0010, 1.0, 0.8
replace_float = 0018, 1.0, 0.82
replace_float = 0020, 1.0, 0.84
replace_float = 0028, 1.0, 0.86
replace_float = 0030, 1.0, 0.88
replace_float = 0038, 1.0, 0.9
replace_float = 0040, 1.0, 0.92
replace_float = 0048, 1.0, 0.94
replace_float = 0050, 1.0, 0.96
replace_float = 0058, 1.0, 0.98
replace_float = 0060, 1.0, 1.0
replace_float = 0068, 1.0, 1.02
base_address = 656468
replace_float = 0000, 1.05, 1.05
replace_float = 0008, 1.07, 1.07
replace_float = 0010, 1.1, 1.1
replace_float = 0018, 1.35, 1.15
replace_float = 0020, 1.7, 1.2
replace_float = 0028, 1.8, 1.25
replace_float = 0030, 2.2, 1.3
replace_float = 0038, 2.4, 1.35
replace_float = 0040, 2.6, 1.4
replace_float = 0048, 2.8, 1.5
#
# The first 14 replace_float values above should allow the line spacing to be
# adjusted in increments of one pixel when using a medium sized font on a high
# resolution device. If you use a smaller font size and/or a lower resolution
# device you might find that increasing the slider one step at a time doesn't
# always result in a line spacing increase at each step. In that case, you
# might want to use replacement values that are not quite so close together.
#
# For example: (I use these values on my 758x1024 Glo)
#
#  0.7 0.725 0.75 0.775 0.8 0.825 0.85 0.875 0.9 0.925 0.95 0.975 1.0 1.025 ...
#
# or: (these might better suit the 600x800 Touch)
#
#  0.6 0.633 0.667 0.7 0.733 0.767 0.8 0.833 0.867 9.0 9.33 9.67 1.0 1.025 ...
#
</patch>

`Freedom to advanced fonts control` (libnickel.so.1.0.0)

Spoiler:

<Patch>
patch_name = `Freedom to advanced fonts control`
patch_enable = `no`
#
## This patch allows the advanced font options (weight/sharpness adjustments)
## to work with sideloaded fonts too. (KEPUB: OTF and TTF. EPUB: TTF only.)
#
# The following passes a junk pointer to N3FontTypeUtil::setupDropdown, but it
# seems the pointer is only passed on to ReadingSettings::getDefaultFontFamily
# where it is discarded without being dereferenced, so it should be safe?
# BEWARE: check whether this still holds in future firmware versions.
#
# N3FontTypeUtil.setupMonotypeDropdown(b,c)
# --> N3FontTypeUtil.setupDropdown(UNDEFINED,b,c)
replace_bytes = 8371DA, 51 46 58 46, 52 46 59 46
replace_bytes = 8371DE, C4 F7 C2 E6, DC F7 90 E7
# N3FontTypeController.setupAdvancedOption(...) --> NOP
replace_bytes = 97BC10, AE F6 8A E1, 00 46 00 46
replace_bytes = 97CA34, AD F6 78 E2, 00 46 00 46
</Patch>

librmsdk.so.1.0.0 hasn't changed, so all the librmsdk.so.1.0.0 patches from 4.8.11073 should work on 4.8.11090 without modification. I think all the libnickel.so.1.0.0 multi-version patches should work too.