Anyone upgrade CSA Derringer to 50Mhz?

[hese7]

I have a 68030 25Mhz CSA Derringer. I'd like to upgrade it to a 50 Mhz. Has anyone done this before?

I have attempted to upgrade a 25MHz Derringer to 50MHz years ago but it didn't work well. The Derringer did boot with 68030 50MHz CPU and 100MHz oscillator but couldn't detect the memory module anymore. I tested several memory modules but no luck. I guess you either need upgraded GAL chips or delay the accesses to the memory slot.

[hese7]

G-Force 030 @40MHz Impact A2000-030 Combo Series II card w/16MB ram
http://amiga.resource.cx/exp/gforce2030
Anyone upgrade one of these 40MHz to 50MHz? I guess I would need a FULL 030 CPU though.

I would consider twice (and then some) before upgrading GVP cards to 50MHz. Some seem to have broken the CPLD chips of their GVPs when they have upgraded their cards (at least from 25MHz to 50MHz).

Something to read:
http://www.verycomputer.com/2_b4c78784503e63a2_1.htm
http://www.verycomputer.com/2_ec55d5cf63753f33_1.htm
http://eab.abime.net/showthread.php?t=79097