Just glue the top wing tips on before attaching the wing to the model!
Wise advice and just the plan I was going to follow!

I have been away and failed to drop by recently, and suddenly there is a monoplane ready for painting! Looks as though you have everything well under control here Zac - the wingtips and wing alignment problems are well on the way to being rectified.
Stephen.
After everyone's advice and prior experience I'm feeling a lot more confident. Thank you for the kind words!
So what's with the star wars lazer guns for ?
Kinda of wrong time period you know 
Alexis
It's a little-known mod the USAS introduced in September 1918

I'm building a Han Solo vinyl figure, I'll put a thread up in The World Of Scale Models thread.