I got another engine and just finished converting if=t for the plane. I still need to turn my prop hub and engine mount but the whole 'conversion' is done. It took me less then 2 hours. This time I took pictures for 'step by step' instruction that I posted in the thread [link=http://www.rcuniverse.com/forum/m_3192059/tm.htm]Step by step converting Poulan 25cc FL trimmer ($25 on e-bay)[/link]

Enjoy.

RysiuM