John and Trey -

I agree that the Trailex is a good trailer for most any application, but even the 21 is underbuilt for double-stacking. Pretty sure the capacity is 1,000-lbs. Two 400-pound boats and boxes/gear maxes out the rig and I have seen several bent frames. That's why I went to a trailer manufacturer.

Trailex = good, configurable trailer. But two F18s or 20s will bend them. Just know what you're getting into.