Carl,
When I installed a Safe T Plus on my Solitaire, The only way that I could remove the axle clamp bolts was with a 3 foot 3/4 inch drive breaker bar with an 8 foot pipe on it. My 3/4 inch impact gun running on 200 PSI would not move them. The bolts apparently have enough flex in the length between the head and the threads to reduce the impact gun's effectiveness. However, after I got them turning, they came out fine with clean threads.
Gerald