I have an encyclopedic memory which filled up a few years ago, but I still have total recall of the old stuff. I'm sure it's because of my age. I'm 49 years old. So I can remember the stuff you've (understandably) forgotten, jimmuller.

You really need 8mm through 15mm combination wrenches. 8 and 9 for derailleurs and many other things. 10 for brake pads and brake mounting bolts. 11 for Weinmann pivot bolts and a few odd seat binder and stem bolts. 12 and 13 are common for seat binder bolts. 14 is for front axle nuts and seat clamp nuts. 15 is for rear axle nuts. Having a 17mm can come in handy. Some hub lock nuts use that.

The cheap cranks' fixing NUTS had 14mm. You need a thin-walled 15mm socket for most crank fixing bolts. TA and Stronglight used 16mm.

Some French-made stems used a 7mm allen key!

I have occasionally used 7mm wrenches on things like cable clips. I think I've even used 6mm but I don't remember where.

For Campy hubs, you need TWO 14mm cone wrenches. Most front hubs use a 13mm, and most rears use a 15mm. I've occasionally needed two 15mm cone wrenches. I also have a 17mm which I have occasionally used. I recently came upon a high end BMX bike that needed a 22mm cone wrench. As luck had it, it didn't need a cone adjustment, but I bought the wrench immediately thereafter and am waiting to need it.

For a Sturmey-Archer AW hub, you need a Sturmey Archer cone wrench. Metric won't do. I guess you could make one by filing down a metric one, but I'm lucky enough to have the real deal.

I'm working on a Falcon bike from the early 70's. A few of the bolts seem to be Whitworth, because my SAE and metric wrenches don't fit. I don't own Whitworth wrenches, and I'm not going to buy them.