I am finishing printing the main body, and I think I'm hitting a problem. It looks like the fins off of lower main are a bit to wide to fit into the groves in the prop guard. I have tried to grind/sand down the fins points to help it fit better, but nothing is working.
Did you print all parts at 100% and did you print the fins laying down or standing up? I imagine that would change wall thickness tolerances in the slicer if the orientation is different. I printed all my fins standing up.