So I'm going to attempt to follow in qsxcv's footsteps - and he was kind enough to give me the code for the Teensy 2.0. I've bought pretty much exactly the same components aside from the shell.
Attempted to solder the FPC connector to the FPC stick board, which was initially succesful albiet weak and it broke off. Tried a few more times and ruined the board, though it's only about £3.50 down the drain, with new components on the way. Here's the weak initial solder:
The voltage reg was another key component which I've soldered correctly (a bit too much here, but I was concerned about "cold soldered" joints so probably used too much). Regardless this is up and running.
Anyway, lesson learned on the FPC stick so I'll very lightly tin the board (connectors and pads) and use the minimal amount of solder and time to connect them.
Edit: On the subject of software I've been messing with the example mouse program for the Teensy. Couldn't get 16 bit data working yet, but maybe in the future. Also, I don't think it'll be possible to exceed 1000hz on the Teensy 2.0 as it is limited to Full Speed USB 2.0 (not High Speed) which as far as I know is the requirement micro-frame intervals.Edited by Furiosus - 10/20/15 at 1:05pm