Thanks Jmacs, the poly mounts were two-fold:
- I originally planned on running a 4-link type setup so I purchased 8 of those suckers before I thought the plan through. Once I started mocking things up I wasn't at all pleased with the amount of ground clearance I was going to lose and was having issues with locating upper links.
- Since I already had them I settled on using them on the wishbone just to take any harshness out of the link setup due to the joint I'm running at the frame connection and the panhard bar. I already had these (
http://www.currieenterprises.com/cestore/Product.aspx?id=2629) from a previous project so I stuck that on my wishbone/frame connection. The panhard bar parts were a universal adjustable setup sourced from ebay and cut and welded to size.
Welding the wishbone directly to the axle would work just fine, just be sure to account for any axle camber and leave clearances/etc for any links and gussets for your setup.
The airbags ride great and soak up just about anything! I run them around 45psi and feel shocks are an absolute necessity to control bounce and sway. Be sure to keep in mind that the bag plumbing must be separate, they cannot share a fill port or any hoses, etc. or when you turn all the air will move to the inside and the trailer will want to “fall over”.
I think if I were to do it again I'd strongly consider hard mounting the wishbone straight to the axle. Other than that, I am still fine tuning the setup and plan on raising the whole trailer with some fabwork between the bags and wishbone to fit wheels and tires to match my tow rig. The setup is perfect otherwise!