I got my drive fixed by AT, but just before that I investigated a way to do it at home.... via the Aminet!!
Short: Make new A1200 compatible to old ones
Author: email@example.com (Christian Sauer)
Uploader: sauer cip informatik uni-wuerzburg de (Christian Sauer)
Do you have a new Amiga 1200 of Amiga Technologies and do you wonder why
some software doesn't work on your machine, but does so on older Amiga
1200s? - Then this fixpack is for you!
This hack even works with software writing directly to floppy, e.g.
XCopyPro of TBG and some games!
The archive includes:
'CircuitBoard.iff' to build up the hardware hack
'A1200FDtest' including sourcefile to adjust the hardware correctly
'ReadMe' for further information
A few reports say that this definitely works... so if you get an Escom revision you could do this!!