I know I am pretty late to the party here, but I actually just finished designing one of these. It is basically a modification of the XT-CF-Lite V4.1 to use the PLUS bus instead. I just sent the design off for fabrication of some prototype boards earlier today.
Does your XT-CF Tandy board layout include a RAM expansion, or is it just the IDE circuitry?
I'm about finished with a Kicad layout for a brain-dead three chip RAM backfill board (sans DMA, of course) using a circuit I came up with that I suspect is pretty close to that RAM card for an original Tandy 1000 that was brought up a page or so ago. Currently dithering whether I want to send it off to a PCB mill as-is or indulge in a probably failed attempt given my level of experience to try to merge the memory circuit with an XT-CF on one grand board.