In answer to the engine mounting, I took my existing engine mount off my model and put it in my used parts bin(5 gal. bucket in my garage) and bought and installed a new mount that holds the engine with bolts. I had to do this because the supplied mount would not fit my OS70 engine that I mounted on the plane. Had I used the existing mount I would have drilled it out and used bolts as ec121 said in the above post.

I have my plane flying now, and it is a good flying model. It flies like a low wing trainer with aerobatic capabilities. Take off is easy with a little rudder control, normal for a taildragger. Make sure the cg is correct and not tailheavy. I added too much tail weight on my third flight, and almost crashed it after having my heart stop. Landing is uneventful with the correct cg. It almost lands itself if you get it set up on a nice final.

Have fun!