Giga Jul

I'm old school and have fully switched. I use the Edelrid Pinch and the Edelrid Giga Jul. Good form and diligence are hugely important, but predictably fallible.

Edelrid's Jul family is The Way. Jul 2 is single strand, and shares geometry with the dual strand Mega Jul. These tend to give the best lockup with most ropes, but it depends a lot on the carabiner, too. Skinnier biner stock tends to lock up tighter, but I get good results with an Edelrid Bulletproo

I think you've pretty much answered your own question where if you haven't had any issues with your belay devices, you probably don't need a third. You can consider whether or not you can get away with using just a single belay device for belaying a leader, belaying a follower, and for rappelling. T

I use a GriGri or an Edelrid GigaJul. I haven't touched a regular tube device in years. I understand that a locking device will provide a sliiiightly harder catch, but I don't think this would make the difference for the top piece of gear to pop, especially with dynamic belaying and rope stretch I a