For HT 2 BBs there's nothing to beat a socket type with a half inch drive and cheatbar guide. you'll need a separate finger tool for setting the preload, but the socket type are leap years ahead of the semi-ring type....they are far less prone to slipping, and you can get a decent bit of leverage. Of course, a decent half inch drive ratchet is also a boon.....
While we're at it, Torx bits and a socket set adapter for use with a ratchet screwdriver and/or a socket wrench are also a great investment if you have rotor bolts, handlebar mounts or chainring bolts that need regular attention. Undoing and then redoing 12 rotor bolts with small Torx key is the stuff of nighmares.
Buy as many different types of 5mm Hex keys as you can. You'll need long, short, P-handle, T-Handle, bent, wiggly and at least two of each, 'cos it's the one you use and lose the most.
I use large sockets as bearing guides on a ghetto bearing press, useful for hubs and headsets, but they also double up for removing the nuts at the top of suspension fork legs, some milled flat, for when an adjustable won't do it. so far I have 34mm, 32mm, 28mm, 24 mm....it's as cheap to buy them singly as you need them, rather than buy a socket set meant for a professional truck mechanic.
Thin plastic tubing (windscreen washer hose) and a variety of syringes for brake bleeding.
A set of dental picks for removing the seal from a cartridge bearing to flush and regrease.
Loads of cable ties. In as many different sizes as you can find. ASDA of all places do really good ones for not much money.
Lubes, fluids and cleaners? Lithium grease, marine grease, coppaslip, threadlock, carbon assembly paste, GT85 and Isopropyl Alcohol.
A garage compressor for drying, spraying, but most importantly tubeless tyre fitting. Can't think how I managed without one.
