Thanks everyone for your input. It seems that the people who fly with YS and work with them swear by them. Just like anyone who flys with OS swears by them. I am mostly likely going to go with the 1.10fz for its power and it is not so big that i will need to cut away a lot of my cowl. Unfortunately the motor is not very cheap but all good things come at a price. Equest, if i get the engine and am having problems i hope you will be able to teach me a thing or two about setting them properly. Thanks.