If you are charging $100.00/hr to tune a car, you BETTER have a chip burner/eraser sitting there and be able to burn 50 chips in a flash and make my tune PERFECT or I wouldnt pay you a dime.
Dont you know how to burn chips without using any of the hardware you mentioned or are you still stuck in the dark ages? A zemulator is just the best on the fly tuning out there. Burning chips takes longer, but is the CORRECT way of doing it without SOME SORT OF EMULATOR OR FAKIE DEVICE. A greddy E-manage and an AFC are FAKIE devices and SUCK. Go ahead, run them on your car. When it blows up at the track...dont say I told you so.