On Sat, 17 Dec 2016, Josh Dersch wrote:
  Model M keyboards are AT-style keyboards, they
won't work with an XT
 (different protocol).  You will need to find a PC/XT compatible keyboard to
 use. 
exactly.
The original IBM PC/XT keyboard is a buckling spring.
So, if/when you find one, it will at least feel like a model M.