I had a chance to visit Henderson's a couple years ago and I'm glad I did. They deserve the reputation they enjoy. They worked for it and they do it every day. I talked with people in shop, parts, SuperSteer and chatted with John Henderson for about half an hour.
The parts list above confirms what I decided during my visit: They pick what they feel is the best of every supplier's product line.
Expensive, yes, but still in line with what one of our Class C owners paid several years ago in another state.
I hope these upgrades will allow you to enjoy RVing for many more seasons.