Kirk:

My trick is to use a length of bar stock, with holes drilled at the engine center to center distance. Then with the engines mounted and the crank shafts bolted to the bar I can glue the nacelles and have perfect engine alignment. No fuss, no muss.

Bill.

Ok so the wing is complete. I must have measured and remeasured the nacelles 10 times in every way I could to hopefully get em in straight with no incedence. The back hatch gets me to the engine servo and the front one to the fuel tank. Seeing as you experienced builders forgot to remind me to install the air tank for the landing gear before I build the fuse, I had to remove a piece of the f5 former to get it in and this allowed me to put the flap servo where it is. I'll put a brace inside the fuse to reinforce the sides. I also put fibreglass out just past the nacelles for extra strength. Starting to worry about weight.
The snow is starting to melt here, and if Mother nature's not setting us for another big flood we should be flying in few weeks.