is the dorcy led light from walmart a pr base? I was thinking about putting the bulb in my tec40. I also need a suggestion on converting my 3d mag. someone responded to a post a while back and figured out how to make a pr base from copper fittings and tubing. that would be great if someone could elaborate more on this. and is there any 3mm led's that I can put in my mini mag's without a resisitor that wouldnt burn themselves out?