I have an A500+ with the same problem.
but it conflicts with my scandoubler.
i am aiming to desolder all sockest and put cabling in between the mainboard and the derringer. I am guessing......! but i thint 1 or 2 inches suld be suficient.
This would be great if it works, but sometimes certain electronic components behave badly when on extension cables like this. You get weird RF interference and echoes on the line, etc.
I'm just thinking of the issue that SX64s had when Commodore initially tried to extend the cartridge port to the back (top?) of the case with a ribbon cable. They eventually had to replace the ribbon cable with a small PCB.
I would think that something as critical as an 030 CPU accelerator might have such a problem.
But it's worth a try.