Greetings, Im here at work and all the specs for the plane are at home. I remember I had to carve out the foam an inch further back from the existing mould in the foam for the main gear. it solved the balance problem with no adverse effects. you can cover the original opening with white monokote self-adhesive trim strips. I must say, I am impressed with the planes performance. I custom made my own snow-skies out of a couple pieces of aluminum " exit " signs. Floats for it came from "foamfloats'' .com....... what a "hoot"!! Coat your wing tips, tip of nose with epoxy because it dings easily. use bigger lite weight tires all the way around because the cheappos they give you are too hard on the plane on landings. Also , if you dont want to make enough noise to wake the dead, leave the wheel pants off. It sounded like a drum roll on the asphalt and my "Hooligan" flying buddies said were going to get kicked-out of our flying site if i dont take the pants off. Its an excellent flyer, needs a little power on landings to be smooth, youll like it, " I nose you will " ! Enjoyed talking to you, call me again if i didnt give you all the info you wanted, Michael