I picked up this Blackhawk S4 recently. The oldtimers down at Kimmerle hydraulics tell me this was the very best you could get Besides the great art-deco styling it has some other nice touches. One is a little headlight. It has a trigger grip. The hydraulics work great but it needs a little help. It is missing the two front wheels. I was informed that these were special ball bearing arrangements. The trigger handle has had one side broken off and ir appears that the linkage that runs through the handle and connects to the pressure release valve is missing. Is anyone here familiar with these? I'm seeking technical illustrations that would show what I am missing as well as any sourse for parts. There is an overhaul kit available that has o-rings and seals and the like but that isn't what I need. Any help would be greatly appreciated. I'd like to restore it and use it in my shop.