RE: Resin or Polyurethane
plans sent mate thanks for the compliment,it is easy once you get the hang of it and the good thing about balsa is its easy to cut and sand and its very lite too.im going to try an 8.4 pack in this one next see how fast she goes with it.the mechanical speed control is ok if you spend most of your time flat out but its not a good idea for running at slow speeds .however i did beef up the alluminium on the heat sinc some .i may water cool the motor next too as this thing gets quite warm.enjoy the plans they were free in MM magazine and a guy on here sent me the plans in pdf.