When we saw Jerry's roller crutch we copied it. Works great. If you do
this, it works best with one of the short rollers with a deep groove.
Extending the tops of the brackets to each side to form a Y shape is
also useful to help "catch" the mast as you lower it and to keep it from
jumping the crutch when moving the mast back and forth.
-Ron
HMS 18 #42 Bluebelle