"I've seen the 1993 video too and from what I hear, Dimebag doesn't say that he "uses" the StewMac pickups. He says that the 500's are hard to get which would confirm the information we know about him. He does mention StewMac.

Becky"

i've got the video playing right now and while he's holding the "dean from hell" someone asks what pickups he uses and he says "Bill Lawrence XL500L's" and then plays a note to demonstrate their sound. then someone says "can you still get those?" and DIme says "yeah man, i get mine from Stewart-MacDonald". and he only mentions the XL500L's...no mention of L500's at all.