It CAN be done, I did it to bodge together a chain for my commuter. Most of it is KMC, bits of it are SRAM, and to make things even weirder, it has three 3/32" half-links in it. It shifts between my two rear sprockets just fine, although I'm not sure the half-links would play terribly nicely with a full cassette/freewheel.

It's been on the bike about 4 months, and hasn't shown any signs of trouble yet.