RE: OS .25FP Any good???
Your correct it is aluminum/brass. Old age is catching up to me.
As has been said many times the OS40FP, the Thunder Tigre 40GP and the Tower 40 were all completely interchangable in parts. I have seen motors with parts from all 3 of the motors combined. But for my money the best was the Tower, 2nd the Thunder Tigre and a distant 3rd the OS fP.
If you see a Tower for sale on these forums or Flea bay and it looks good give yourself a treat and buy it