I tried building this kit 40 or so years ago. I cracked the canopy trying to blend it into the fuselage and that was the end of that. No Falcon replacements back then. Fast forward to a few years ago and I found one cheap and thought why not? A smart modeller would have reached for Trumpeters effort, but I couldn’t get past forward fuselages shape issues. I added Reskit J79 nozzles and main wheels. The J79’s didn’t actually fit and I had to increase the diameter of the rear fuselage by wrapping it in thin styrene then copious sanding and superglue gel. Took forever, and all you can see are the nozzles poking out the rear… I also hacked and detailed the main landing gear legs, then remembered too late I had the SAC replacements which are way more accurate. The vertical fin was modified to the correct shape and the second set of blow in doors added on the intakes. Finally, the whole thing was re-scribed. What crossed the finish line was not what I hoped, but the beast is in the case.