Goose, at NewBeeDrone dissected a Nano and did a video recently. I don’t think the FC will fit the larger cockroach style frames.
Another thing about the Nano is the battery holder. It’s very tight with a new battery but even tighter, if not impossible, to get a slightly puffed lipo into. The tightness of the battery holder warps the frame but it can be stretched back into shape. Trying to get the battery in is probably how I broke to duct supports.
I highly recommend watching the dissecting video by Goose prior to making a Nano purchase.