Gentelman :

I recently completed WM Extra 300 S and I thought I would pass along what I did and what I used.
I have the purple and white version ( Just beautiful) I installed a OS 160 w/ a bisson Pitts muffler and turned the engine to 90 degrees (sidemounted). I used very little of the hardware. I used Robart pin hinges (3/16") and Rocket City control arms. I installed 3/16 dowels through the balsa with a hole for the control arms. I glued the stab and used the screws that came with it. At first I used the plastic piece to hold the pants on, but before I put the plane on the floor one broke.I live in Naples Florida and the grass is pretty tough. I used blind nuts instead. ( HIghly recommened)

The plans are as bad as the hardware so I looked through them and basically built the plane the way I wanted it built. (to Last)

I have used wing nuts instead of the nuts supplied I drilled a hole through them and attached spring clips (They won't come off)
Can you imagine a plne of this size with L bends for conrtol surfaces. I am about to balance it and fly it this week.

Someone mentioned a pump for a 160 ? Please comment !!

Bill Walter ( Mr Splinter)