Captain - let me see if I can list them.
The angular piece at the top of the wheelwells fits into a notch on the bottom of the cockpit tub.
The vertical stabilizer needs to be thinned. Test fit the rudder as you go.
The underside of the rear fuselage will become concave if you don't reinforce the seam.
When glueing the wings to the fuselage, align & glue the rear part first. I always end up using filler on the underside of the wing fillets.
The nacelles are a tough match to the wings. I usually remove the plastic on the lower wings just above the engine. This will make the bottom wing into 3 pieces. The rear nacelle cone needs careful trimming & dryfitting. There's little room for weight in the nose. I add an equal amount to both nacelles (I use pennies !)
Dry fitting is ESSENTIAL on the main gear legs to wells. It has on odd way of attaching. Be careful attaching the retractors.
That's all I can think of right now. If you run into anything questionable, feel free to e-mail me. I'll answer as soon as I can.
Good luck, & thanks for the tip on the Mistel !