Yes, There is a pre-shaped and hollowed top block. Along with other laser cut parts this is a fairly simple plane to construct. If you do as I have done, that is make changes as in firewall position, taildragger vs. tri-gear, vertical stab redesign etc. it will add to the workload. But building it as designed is a snap due to Jeff's work in his plans. I have yet to build the wings but they look fairly straightforward. This latest picture is my method of joining the sides square. I wish I had a fuse jig but Gator hobbies was hit by a tornado and it may be a while before I can get my hands on one. I am just as able as anyone to make a mistake in a build project so I don't recommend doing what I do necessarily. You may have better abilities than me. Skip