I couldn't find any info regarding timing fix and ACA1232, I take it that it will be needed to do, right?
I have pre-ordered one at Amigakit and I just found out that my spare A1200 is a rev 1D4 Budgie Rev 0 (391425-01)
My main A1200 still needs to be opened and checked.
As a quick test I followed clauddios advice
and tested Arabian Nights and Mad Professor Moriarti from floppy disks.
Arabian Nights v1.00 - Intro works but crashes right before language selection (maybe fast ram issues ?).
Arabian Nights v1.01 - Works with no problems at all
Mad Professor Moriarti - Also works with no problems at all
Arabian Nights v1.00 works using WHDLoad, so defo just a fast ram issue.