Timing light

The high end digital dial back lights are the way to go if you "just gotta have one". I would never use the old style with the dial back knob with the printed gauge on the back. Is the knob indexed right? Is the gauge marked correctly? The really crappy ones have a gauge printed on a sticker. LMAO How many degrees could "ALL THAT" be off.

No, for me it will always be a standard inductive non dial back light and let the engine do the dialing back. Most accurate way to go unless you use some sort of high end scan tool or even a decades old tune up machine. Even the high end digital lights can succumb to interference from different sources. I've seen it happen. Keep it simple, stupid. lol