Can anybody discuss the relative merits of the various mechanisms for
reducing beam of a tri for trailering. My understanding is that the
most often used systems a

1. Tubes in sleeves where the amas simply slide off of Al tubes which
slide out of fittings in the hull.

2. Tube and sleeve systems where the beam can be reduced by tubes
sliding past each other so the boat can fit in a normal slip

3. Folding systems (Corsair and Dragonfly, etc.)

4. other demountable amas.