I'm compiling a list of all the reputable people/companies who do air drill rebuilds, especially the ones who do a lot with JD 50/60/90 drills, but also CIH Precision 500s. 

I know about these:  Lyle Jackson, Travis Friend, and Dave at Precision Ag in Pratt, KS.  Just wondering who else was out there doing this?  i.e., somewhat making a business out of it, and having capacity to handle more rebuilds than what they're currently doing.