Thanks for the suggestions from both of you. I mounted the Gotek in the B: slot on right with the known good Epson drive as A: on left. The issue of the read errors on
A: returned especially when trying to use the copydisk function either cpm or tpm. I put the termination resistor chip on A: and it works perfectly now. The problem is
disassembly to get to the drives requires unplugging power and data cables from the motherboard since they are so short in length so if the problem is intermittent
I might not know right away since so much pulling and tugging goes on. The end of the floppy cable is on B: but of course no place for termination on the Gotek so
decided to try on A: which is mid-cable. I'll update here if things go south again.