I have 29 magazine total for four XDs:
picture is slightly out of date.
For my XD-40 Tactical and Service
4 XD-40 15rd Arrendondo extension
2 XD-40 15rd homemade extension
6 XD-40 12rd homemade thick basepads (no added capacity)
2 XD-40 12rd stock
2 XD-40 10rd full size limited capacity
For my XD-40SC
3 XD-40 9rd SC magazines (one with a Pierce ext.)
2 XD-40 12rd with grip extension for SC
For my XD-45ACP Tactical
6 XD-45 13rd magazines stock
Odds built from a bag of parts I found in bargain bin at Gander Mountain.
2 XD-9 10rd full size limited capacity (don't even own an XD-9 so make me and offer