Velochampion are selling the Shark Aero Pro frame with a hefty discount and it got me wondering just how easy it is to buy the component parts and build a bike yourself? However, looking at the frame spec I'm lost about where to start? I'd probably want Ultegra di2 but then there are specs for the bottom bracket which mean little to me? Can anybody point me to a good source to learn about this stuff? Also, it looks like the rear brake is a direct mount below the bottom bracket, which looks pretty neat. Shark composites link: https://www.sharkcomposites.com/aero-pro-road-module Velochampion: https://www.velochampion.co.uk/coll...rk-aero-pro-stealth-ghost?variant=51241990227 Thanks for reading and replying.