I do them myself. I use a homade "slide hammer" bead whacker and a big "Jackall" jack under the bumper of my truck to pop the beads. The rest is just patience and carefull cleaning and inspection of the rim,flange and lockring. Then put it all back together with new tire and slide it under the truck to act as a cage and reinflate it with a long whip hose so your well out of the way and safe. Comon sence and a bit of advice from an oldtimer goes a long way here. I now can pass on a lost skill to others. Seems modern tire shops have evryone scared of these simple "feild serviceable" rims.

I suffer from ADAD (Advance Design Acquisition Disorder)