Airey Tuning in Cheriton have a strong reputation among all the folks I’ve talked to about carb tuning - I’ve never had a chance to use them myself though.
I bought a short plate from JDM Plates (invoiced as “Small, Legal, Printed Number Plates For All Vehicles - White (Front), 7 Dig Plate With 1”).
Here’s a before/after compared to my (damaged) original Caterham plate:
Here’s the latest progress on my shift light. I’ve split it into two parts. First, there’s a small box in front of the gear knob with the brains inside and a couple of controls.
Then I have a remote unit on the dash that contains just the lights. It’s 3D printed with a sloped base to match the angle of the dash top.
Finally, here’s a quick video of it in action.
Here's the (hacky / work-in-progress) code:
https://gist.github.com/oesmith/82a75ec3cf0ef888971456fe8fc461bb
I used Arduino with the RP2040 core, although I'm going to switch to using the Pico C SDK because I can't get on with the Arduino IDE. I used a Pico because I could use the PIO cores to bit-bang CAN accurately and save the cost of a full CAN controller (and I had some unused Pico boards in a drawer!)
I've just built a breadboard prototype for a shift light with a Pi Pico, a NeoPixel stick and a handful of other bits. It reads RPM via the CAN bus connections in the OBD port.
I'm going to see if I can get it all soldered together on a proto board, then maybe work on building a sensible enclosure.