I finally started my Corsair today. My first concern was installing the DJ 72cc engine. I want to swing a good size 3 blade and thought this may be worth a shot. The stock standoffs are 45mm, putting the prop hub at 185mm. This did not look good, so I am using a 25mm standoff with 3 mm spacer which puts the hub at 175mm. The firewall will have to have a whole cut for the carb, but not much of the carb will be sticking through. The stock muffler is huge, but only clips the corner of the firewall. I will remove the tristock from the corner where it is a problem. The firewall will be fiberglassed and pinned following installation. I should have the engine mounting complete tomorrow. I may end up removing the 3mm spacers. I'll see how it looks first. I'm excited to get this bird in the air. It's been a long time coming.