When i work on models in my shop, I often talk to myself for expert advice. For instance, where in hell did I put those pliers? Or, why did I put them there? One day I began a list of what I consider actual improvements over the 1950s for those of us who still built from balsa. Being old school, to make the list, it must be good. Lazer cut parts and kits. Cyoanoacrylate glue. Aliphatic resin glue (titebond). C A accelerator(for the C/A glue). Acetone to unglue fingers, and fingers from work. Print shops with 42" x 48" enlarging copiers. Computers and internet aviation sites. Engines that last longer than one lean run. Power panels(so you know what the glow plug is doing). Decal paper for computer use. Rechargable batteries. Other than that , I'm stuck in the 50s. Still cover with silkspan and paint with dope.