'84 Holdsworth: strip-down and powder coat

BB cup is strange - I thought that all 20t splined cups had the same pattern. Perhaps it is a problem with the design of the tool rather than with the cup - I have been using the same Park BBT22 tool for years and have never encountered a shimano 20t cup that it didn't fit... although if you can't find a tool to fit it, it's easy enough to cut out a plastic cup.

The removal of the headset will be made much easier by buying or constructing the proper tool. I used to use a home-made tool (22mm copper pipe, cut some slots in it and flare the ends out) which cost about £2 but only lasts for 2-3 uses before it crumples up. A Headset Rocket is about a tenner, from memory, and seemingly lasts forever. Soaking the headset in penetrating oil helps (PlusGas, diesel, Duck Oil or even WD40).

Some good tips, may try cutting out the plastic cup as I will probably get a new BB anyway. As for the headset, will check out the tools and see how I get on.

Thanks