Here's my commuter, a 1991 Stumpjumter drop bar conversion. Only things original are the headset and rear hub. Except for the rims and dynamo hub on front everything else was from my parts bin, so a pretty inexpensive build (bought the bike for $150. Was in great shape, but the back half had been painted with a rattle can. I had it powder coated and used parts for two High Sierra builds for my boys). I'm posting the pics mostly to illustrate the locking scheme I've arrived at. Sorry about the non drive side pics, especially since they don't show off my favorite derailleurs (Suntour Cyclone MkII, also on my 1985 Miyata Six Ten).