Guys I hope you don't mind an intrusion from an electric flyer, but a couple of tips you can use.
#1 the missing tabs for the tail, there is a tech bulletin on Horizon's site about them being not packed, just call them and they'll send em to you.

#2 if you run into a problem with the latching mechanisim for the cockpit, I did a little digging on mine. Actually used a magnifying glass and a mag light. What a cool set up.
It's adjustable. The pin sits in 2 bushings and a brass(?) block, the lever is actually a threaded rod that screws into the top of the block and pinches the pin in place. You can loosen the lever by unscrewing it to adjust how far the pin protrudes, then tighten the lever back down. There is a spring between the block and the rear bushing to give the spring action. I drew it out for ya.

Oh and a pic of mine. 8 pounds ready to fly, and with electric you throw away the weight box and lead weight.
He He He, even has the correct pilot.