[PeterT]

I took a quick look through an older version of calibre's source.

Here are the Profiles and screen sizes

Spoiler:

	Line 225: class OutputProfile(Plugin):
	Line 239:     comic_screen_size = (584, 754)
	Line 273: class iPadOutput(OutputProfile):
	Line 280:     comic_screen_size = (768, 1024)
	Line 435: class iPad3Output(iPadOutput):
	Line 437:     screen_size = comic_screen_size = (2048, 1536)
	Line 444: class TabletOutput(iPadOutput):
	Line 450:     comic_screen_size = (10000, 10000)
	Line 452: class SamsungGalaxy(TabletOutput):
	Line 457:     screen_size = comic_screen_size = (600, 1280)
	Line 476: class KoboReaderOutput(OutputProfile):
	Line 484:     comic_screen_size         = (536, 710)
	Line 498: class SonyReader900Output(SonyReaderOutput):
	Line 505:     screen_size               = (600, 999)
	Line 506:     comic_screen_size = screen_size
	Line 515: class GenericEinkLarge(GenericEink):
	Line 521:     screen_size               = (600, 999)
	Line 522:     comic_screen_size = screen_size
	Line 533: class SonyReaderLandscapeOutput(SonyReaderOutput):
	Line 542:     comic_screen_size         = (784, 1012)
	Line 588: class CybookG3Output(OutputProfile):
	Line 596:     comic_screen_size         = (600, 757)
	Line 641: class KindleDXOutput(OutputProfile):
	Line 650:     comic_screen_size = (771, 1116)
	Line 665: class KindleFireOutput(KindleDXOutput):
	Line 673:     comic_screen_size = (570, 1016)
	Line 681: class IlliadOutput(OutputProfile):
	Line 688:     comic_screen_size         = (760, 925)
	Line 693: class IRexDR1000Output(OutputProfile):
	Line 702:     comic_screen_size         = (996, 1241)
	Line 707: class IRexDR800Output(OutputProfile):
	Line 716:     comic_screen_size         = (768, 1024)
	Line 721: class NookOutput(OutputProfile):
	Line 730:     comic_screen_size         = (584, 730)
	Line 735: class NookColorOutput(NookOutput):
	Line 741:     comic_screen_size         = (594, 900)
	Line 744: class BambookOutput(OutputProfile):
	Line 754:     comic_screen_size         = (540, 700)
	Line 759: class PocketBook900Output(OutputProfile):
	Line 766:     screen_size               = (810, 1180)
	Line 768:     comic_screen_size         = screen_size

Why not have more than one SD card?