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[quote user="John Busby"][quote user="scoobster28"] Not sure if this post belongs here or under the "scratchbuilding" forum, but I am bodymounting Kadee #1 scale couplers on a USA Trains 44 Tonner and will need to build up a styrene pad and then drill and tap it. I have ordered 4-40 stainless steel screws, a 4-40 drill, and a 4-40 tap. Is there anything I should know about the procedure, or any tips? Thanks. [/quote] Hi scoobster Probably should really be in scratch building, but right now you need advice rather than told to put it somewhere else. Mission Control we have a problem[:(] If I read your post correctly you have a tap and a tapping drill that are both the same size it isn't going to work[:I], as you will have no styrene to cut the thread into[oops]!! the tap will just fall through the hole. You need to consult a chart to find out what the correct tapping drill size is, it will be smaller than the tap. Also you will have to carefully drill the hole using a hand drill. Power drills have the nasty habit of melting plastics. These drills are obviously quite small so have plenty on hand, as you will break the drill precisely 5 minutes after the shop has closed and you will not be able to get another one till Monday if you don't have a few on hand. regards John [/quote] John, Man your right about that because I broke off plastic several times not thinking and I was not a happy camper. I need the light bar for a job the next day (Sunday) so I had to use some JB on it. William
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