EGT indicators

Finished the EGT indicators. These were U/S units from ebay (one is from N88ZL) and have been converted to Switec stepper motors for cost/accuracy/maintenance/reliability reasons.

I decided against switching the original lightning to LED to keep the original look at night. Bulbs are cheap and easy to replace and have between 5000-40000 hours lifetime, more than enough for decades of simulator operation.