Thanks hius07,
I got v2_5.122.2.bin 215mb still seems like a lot so I decompressed, mounted and had a look around.. it looks like fonts.sqsh is about 81mb, could I remove some fonts
Fonts in fonts.sqsh
I coming to conclusion it may be mmc memory problem, maybe need a replacement chip or pcb!
Been reading this great article
translation of
https://www.zephray.me/post/kpw2_debrick_1