KR> Re:washer add to prop extension.

[wcraw...@cmhc-schl.gc.ca]

The wood prop already has a bored centre  hole 2¼" and the whole thing 
that fits quite well over the 5" extension with 6 bolts. The hole is 
counter sunk about  3" deep, All the washer does is make this hole 2-7/8" 
in other words the prop now remains about 1/8" from the cowling. You can 
make a prop with a centre hole as deep or shallow as needed,