Here is my choices and these are the only tools I use. 1.NMRA gauge 2.KD Coupler hight gauge 3.Jewelers files. 4.Small screw drivers 5.3 prong holder 4.needle nose pliers-small,medium and large. 5.Regular screw driver with narrow tip for truck screws. 6.Modelers saw 7.Modeling knives with large,medium and small handles. 8.Small pair of vice grips for opening stubborn paint lids. 9.Dremel Tools-Electric and battery powered. 10.Small soldering iron 11.Pin vice 12.Small flashlight that operates on AA batters. 13.Tweezers 14.Scissors..Medium and small. 15.HO Scale rule Also I have several odd and end tools just as a small ball peen hammer,electrical tape,pocket knife,several old 35mm film canisters that contains various size screws and KD washers. 3 small plastic fly boxes holding KD couplers,detail parts,spare coupler boxes and clips,3 sets of trucks and various size collets and chuck for my dremel tools. I would be lost without my Dremel tool..I have found that tool can do just about every thing from cutting ABS plastic to cutting rail and then some.