don't sweat it. leave the colwing til after you get it framed up.
scruff the abs on the inside so the fiber glass will adhere better and just apply epoxy.
I use masking tape on the outside to hold it together until the epoxy cures.

don't drill any mounting holes or trim the rear of the cowling until after the engine is mounted.
you have to makesure it dosn't rub the back of the spiner, muffler and stuff like that.

you know...measure twice and cut once.

if i can recall i think it was a built in rigth thrust, so the cowling is not going to sit exactly straight, straight.

when cutting out for the engine..trim a little bit at a time with a dremel. makesure you allow
enough clearence for vibrations of the engine and carb intake.

you can practice with the wheel pants thou.

I just use clothing dye to tint the canopy or go the black out FX and paint the inside.