Graft other medlars on it. Quince and loquat don't make long-term
compatible grafts. Loquats are usually grafted on pear or quince and the
graft union buried so the scion roots before the graft can fail.
Rob, Lon, & others
While I'd second the nomination for more medlar cultivars, what about
mayhaws(Crataegus spp.)? Perhaps they'd also be compatible with medlar? I
would suspect that they'd be hardy & productive for Rob(aren't you in
HotLanta?)