The pops are recommended for low pressure input for ease of engagement. The v2 regs are also tougher to engage than regular valves due to volume. Even
What's the reasoning behind not using a SHP with a POPS?
I use a SHP with my POPS, and I've never encountered any issues.
Yes, the level 10 bolt works on all of the valves. They are the best upgrade available to any mag.