: Thanks Chuck.
: I've been doing some thinking :-) and have decided that the only way to go is
: with a round mould. To get the full use of the adjustable ferrule it is
: best to keep it round, as the oval dimension will not be correctly
: oriented if you change the blade angles.

Oval just the half that is your control hand, then blades are alway correctly where you want them.
You can make a male mold of pink construction foam with the round to oval transition. Glass layers over it. You can break up and dig out the foam with most anything long and narrow (sharp stick, file, metal rod, auger drill taped to rod,etc.)

Randy