Not sure what tyres you are running but I am using 205/50/15 Toyo T1-R's on the back, you need the extra pressure to stop the sidewalls from falling over in the corners and it takes the squirm out when you throttle off, they don't look over inflated.
If you look at most mid engined cars, the tyre pressure is significantly higher on the rear and should be a reinforced multiply sidewall, unfortunately I ordered the reinforced tyre but only got a single ply one so I will just have to wear them out soon
Snetterton next month....
17 sounds right for the front but way low for the rear.
Thanks re the wiring
everything worked on first power up too! it's the original loom I'm having problems with atm!