Okay so I'm modelling a toy quadcopter I bought for a school project, and it's a pretty complex shape so this is all unknown territory to me.
Here's the quadcopter:
This is what I've modelled so far:
This bit at the back is what's causing trouble for me:
I kinda expected this, but when I loft between A and B, it fails once I add in guide curve 4 (I'm guessing because it doesn't go all the way from A to B. However if I were to continue that guide curve along fully, it would be identical to guide curve 3 from that point on.