Do you guys know if you can make your own rudder blade and how would you do it? maybe i should look into doing that with spare time and maybe out of some hard wood , then maybe fiberglass it?
Sure you can
if you are a master technician with a great understanding of underwater foil dynamics -
otherwise, you will probably be much better off getting a new or used pair of EPO's
. Do you guys think I would gain a knot of speed with these ?
Really hard to say - All other things being equal
depends on how bad of condition your old ones were,
if everything
was aligned optimally/correctly,
and if everything is
now aligned optimally/correctly,
and if this (rudder) shape is a more favorable shape (and condition) for your boat .. then yes! you should be much faster! enjpoy!