My helmet had a 59 cent optional upgrade to grind mode ( I.e. a roll of black vinyl tape). But, yeah, I forget to remove the tape from the sensors and I flash myself all the time
For a good cheap helmet, the weld shop has a Tweco with 4 sensors for less than 100.00 dollars. Battery and solar backup, not sure on grinder shade. It has the standard view area. They did highly recommended it.