I have built both the F-20 and F-18 models and are still flying them. As was stated they do require some experience in building. The fuselage on both is built in the shape of a stop sign and you add the top and bottom and side sheeting which overlaps the space for them, now trim and sand the four open surfaces flush and then add the last pieces of siding. You end up with a real strong fuselage. The F-18 builds the same way except you build two fuselages and tie them together. There is a lot of sanding, but it sure looks good when you are finished.

Both planes fly like they are on a rail. The F-20 is not for the beginner pilot as it is fast. The F-18 looks like the real one in the air and comes in nose high for landings. I call them my poor mans jets. I have a OS .46 in the F-20 and a Rossi .90 with pipe on the F-18. Both planes are about 6 years old and still going.