I've done every modification that is on my car myself including single turbo conversion, gauges, fuel system, intake manifold, cams, swapped valve stem seals, timing belt, water pump, pulleys, electric fan conversion, swapped entire interiors including the dash, swapped to a built auto then a 6-speed, hood, hatch, front lip, redid my turbo brakes, then went to NA brakes, then back to turbo brakes, rear end, axles, full coil overs, piggy backs, exhaust, headlights, swaybars, wheel bearings, etc.
The only thing I am not real familiar with is rebuilding the motor, which I will never have to do because I am happy with the power the stock motor will hold, and I know pretty much nothing about standalone engine management systems and tuning them, which I also will never need to know about because piggy backs will be fine for my horsepower level.
Steve K.