The right bike for you. QUIZ TIME

Okay QUIZ time.  Today I have been working on a couple of bikes doing the usual maintenance to keep the bikes in good condition.  I have spent quite a bit of time working on one bike in particular. Tools used: Vernier, 10mm HSS drill bit, angle grinder (Johns that I borrowed) hammer (my own, John wont lend his hammer out) along with various spanners, screwdrivers, allen keys etc.

So anyone fancy having a guess at what ive been doing?