What is this? Some sort of intervention? I dont see James with kids! When are you marring Rikki James?
Steve, I couldn't agree more with you about your comments on wiring and how spending money now can save you money.
I have been buying alot of spares of everything that could stop the motor from running or me driving, things that can be changed out at the track (so not spare engine and gearbox ect, im not that rich or have a transporter) but things like spare sensors, fuel pumps, injectors, seals ect.
I wouldn't bring them necessary to every event, most will be day track days ect, by the time something failed and i fixed it prob wouldn't get another run anyway, but for interstate events exp several day events like WTAC or your MR2 trackday prob worth it, as like you say, the money spent in going to the track (track fees, accommodation, petrol, time off work ect) for somthign small to fail fine, day lost, cant drive, but for intermittent faults and being track only car, it means spending all that money again and days off work to see if the fault is fixed!
Have a fuel issue, dont know what it is, fine change out the sensors (maybe thats all it is), fuel pump, filter, injector, coils whatever, quite quick to do, if problem has gone, can bench test each part later.
Other reason is alot of parts may be custom or from overseas, can take months to get new parts.