Alan,

I am also using an OS 120 AX with stock muffler in my Excelleron. No mods for a tuned pipe! It's a good combo, plenty of power, easy starting, very relable running and cheap fuel. Not much clearance to swing a 15" or 16" prop. Had to change out tail wheel, which I considered weak, for a Sullivan that stood a little higher. Will remove part of lower fin and mount tail wheel to fuse or try 3 blade prop or both. Plane does fine as is, just not much room for error and "stance" should be a little more nose high. I used the supplied mount and set up parallel with the rails. Too much offset. Very difficult to manipulate the mount to reduce the offset. Will plug and redrill for 2007 or change to firewall soft mount. Don't really want the hassle of removing the rails though. But, I could then get the exhaust on the bottom by side mounting and make getting to the glow plug a little easier. Might even reduce the amount of weight in wing tip. Was concerned with rail thickness for the 120, so added one-eight ply (not the light stuff). Blind nuts keep pulling into the ply/rails. Will change to inserts if stay with rails. Reinforced the gear right away. No problems after 50 flights. Did not use the metal hinges supplied. Was taught long ago to avoid metal-to-metal contact. However, never heard of a problem with thi s plane. Used CA hinges and found 2 in one side of elevator completely severed when inspecting before last fly session. Don't know why they failed like this, but will replace with HD Du Bro. As pointed out in article by Dick Papas, supplied control horns do not line up with hinge lines. Arms are too short. I will be changing those out also. Did not expect to carry on like this. If any one has a comment for me, would like to hear.

John D.