I would respectfully challenge that statement. Most of the VV PV's out there will give you a resistance reading which will help in setting up your coil. If you are getting a much lower resistance reading than the number of coils you have wound, then you know you have a problem. Also, most will not fire if there is a short and give you an error message. More importantly, you can "fix" a coil with low voltage using the Peter K method for Genesis style wicks (good advice is to start low on a freshly wound coil, regardless of the method or wick type). On a mechanical mod, especially one running at high voltage, an incorrectly wound coil will either pop the coil or pop the safety spring if you are lucky. When I say most VV PV's, there are exceptions like vv ego's, BuzzPro's, etc. with no display. Quite the contrary, a good vv (ProVari, Zmax, Vamo, Lambo 4.0, etc.) device is almost a requirement when setting up RBA's, and will give you resistance, allow you to burn in and fix a coil at low voltage, and will not go into meltdown when you get a short .