GW 1800 Roadsmith w/6 degree. Be careful at high speed with the effect of 18 wheelers. Might be b/c of the extended wheelbase? I got used to mine and now wouldn't have it any other way.
I also have the RS with six degree rake. However, the 18 wheelers don't seem to bother me that much. Yes, I get a little movement from the turbulent air but nothing that pushes me out of control. I'm wondering if the running boards on mine help smooth the air flow around those huge rear fenders and reduce the "push" I would feel otherwise. I notice in your picture that you do not have the boards. Just a thought.