Well, I have a E-matrix@ 50mhz in my 1200 and it works really well and no need to modify anything. Would like to the option to relocate kickstart into card ram so I can softkick 3.1 but not sure this is posible?
Also, back in the day, my old towered 1200 needed a timing fix when I upgraded to an Apollo 1240@40mhz as it keep crashing. Once done, worked like a dream so don't be too hard on Jens, it's not a new phenomenon and anyone producing new hardware today should be applauded and supported.
As far as I know the E-matrix range are rebranded Vipers and definitely not created this side of the millenium so not quite sure what E-bayer means?
http://www.bigbookofamigahardware.com/bboah/product.aspx?id=1839