1.5" pins it is then.
As for glue, I will use Titebond Ultimate Wood Glue III 8 oz. and Tower Hobbies 30-Minute Epoxy 9 oz. Hopefully thats enough of each.
I guess Ill have to go break a ceiling tile in my basement accidentally, so I can use it. Just Kidding, but ill find something.

One more thing I thought of. Im going to have to install the tank too. What size foam rubber should I use. The 1/4" or 1/2". And while we are on foam topic, how about for the receiver and battery?