Since you've upgraded a couple players + you're in Canada, any chance you've got a couple extra DRAM chips kicking around?
Okay, I dug through some boxes here and found RAM chips compatible with the Mk2a. These can be stacked and used per the BBS thread on that subject:
https://empegbbs.com/ubbthreads.php/topics/196380https://empegbbs.com/ubbthreads.php/ubb/download/Number/3299/filename/214166-rita1.jpgYou'll need to wire the bank enable line
and flash the updated e000 segment to enable the extra bank(s). I suppose I ought to include that flash segment in the bigdisk builder stuff.. but for now it ain't there. Hijack kernels >= v389 automatically detect/enable extra RAM banks.
You can have a pair of chips -- PM me with mailing info and I'll post them to you.
Cheers