I still like my basic 20 year old timing light just for setting base timing.

I picked up a fancy new one a year ago from Summit for dialing in my mechanical advance & vacuum advance. Pretty cool you can dial in the initial timing & dial it back to the 0 on the balancer. Then you can dial it back & use the tac on the screen to do the mechanical & vacuum advance. It also does 2 stroke & its back-lit for nights.

https://www.summitracing.com/parts/ino-5568

A buddy of mine has the standard style with an actual dial to turn back the advance but he says it turns too easy & he has set it wrong because it slightly turned on him between adjustments.