[bigeasy1]

My arch was made by Atlantic towers as well. However I opted for a custom built model made specically for the 23 Sceptre
I weigh 255 lbs and I can hang from the arch with absolutely zero movement or deflection from the arch.Its been six years now and its still as solid as the day we installed it.

Atlantic recommends applying stress to the arch when installing it so its purposely made so that tension has to be applied to it (width) when mounting it.
Atlantic supplied backing plates with the arch which I did use but I also made extral large rectangular 1/4" thick aluminum plates mounted to the back side of the fiberglass.
I think this mounting system works well and takes a lot of stress because there are a couple compound bends which add to the rigidity of the mount.

We dont often get the big swells on the great lakes (lake Ontario) like the saltwater folks do, but more often than not we get those nasty steep close together waves like Long Island sound that feels like being in a washing machine SoThe arch takes its share of vibration With no loosening or damage to any of the 14 extra rod holders, or the radar dome or gps & vhs antennas.
Im very happy with its performance