Well, it was all going so well but I've been tinkering with things again. Made up a little MIDI controller to sit next to my keyboard and give me a bit more hands-on control over a few parameters. I really like the intergration that the NI keyboard provides and mostly everything I ever want to adjust or automate is covered, but I've found myself wanting a few faders recently.
Pretty much everything I looked at buying either had a load of controls I wouldn't use, tiny faders, or was just a bit too expensive for my needs. Seeing as I've already got the kit and I like learning things I decided on building one.
It consists of 3 x 10k linear faders in a box, with a Teensy dev board doing the thinking.
The result:


The parts came to about £50 delivered (annoyingly I had to order from a couple of suppliers each with a delivery cost so it could be made for even less), and it works really well. All built and coded by following guides from kind people on the interwebs, I can take no credit for any part of it!