"JR North" wrote in message
...
The Arch does nothing to prevent sway, except get in the way. The
attachments of the frame to the Arch do not affect it's stability, pro or
con. Vic is right.
JR

Your frame is inside the confines of your radar arch. It certainly does
add to the stability of the frame and prevents radical sway.

Enjoy the evening JR. I am waiting for a phone call from my son on Parris
Island.