There are quite a few folks who take HK USP 40s and ream the chambers to 10mm spec. And feed them with Sig mags.
You could do the same with the XD. You just can't run full pressure ammo
I could make a list of a bunch of guns i have, or "have", or wish I had. Why would one feel compelled to provide that infornation freely? Do you feel the need to show off? Is it some immature game of oneupsmanship?
Why do you feel it necessary to list your guns?