Here is the progress to date - the motor mount and coupler is bonded and the fins are dry fit. Looks like plenty of room for a bunch of 18mm mounts, right? Well, not so much with the Estes retainer slipped on. D'OH!I could put the mount on the body or even section the body and have them partially exposed. If I wanted a cluster, the latter sounds like a good plan. But I don't, so I won't. Probably.The fins won't be attached until maybe this weekend so I have time to ponder this build.But, it will likely be a 4FNC, single 29mm. Probably.