I have to also agree that you do not need these things to build or fly your plane as there are alot of ways to accomplish the same tasks with out them. I would however advise you to put some of them on your Birthday and or Holiday wish list. The CG machine and the dead center tool for motor mounts are the slickest things since fruit punch. I have been in this hobby for over 30 years and I have balanced my planes using many different methods. I have had my CG machine for awhile now and I will not do it any other way now. It allows me to fine tune my CG if I want to and to remember what it is set at if I want to change it a little. The dead center tool is another tool that was to long in coming. I have not screwed up a motor mount in years. Great Planes has devoloped alot of tools that were a long time in coming and as your experiance level get's higher you will want to look at some of them. I think I have all of them and use them all. The hinge cutting tool (plug in the wall version) and the power plane make these tasks so much nicer. But as I and the others have stated, you do not need these tools to build or fly a plane, but they are great stocking stuffers!!! Good Luck, Dave