[sm=surprised.gif]mrRB and or ghost-rcu, I have the os 160 and are looking into the stearman to purchase for this engine, questions? understand the need to build a mount 3" by 4" by 7/8 and the tank location is in the stock location? or lower and if so how much?also have the 4" smooth inflatables are this the right ones or the treaded ones, the ail issue I believe I understand how to correct 7/8 instead of the 1 3/16 want to thank all for any input really is nice. builder jim