Success! No popping found on squier-talk forum from Jim Baritone. https://www.squier-talk.com/threads/kill-switch-question.49709/page-2

Removed the volume switch I had. The test has input output jack , kinda like a breadboard so don’t have solder on my guitar while testing.

Right now I have it wired with about 12M total resistance, will try 4.7M resistor next time, also will try on a spst because that is what is most common. An arcade switch just looks perfet, need something smaller than 20mm.

This thing does clean tremolo effects no popping sound. Will feature 2 killswitchs on my guitar . Tom Morello style latching with two volume controls. 1 volume turned down. His style is much harder to master but has the most versatility. The Intro to “Know your Enemy” is prime example. Really impossible to do with the momentary switch. You have to press the momentary switch first to turn off, hammer on, then release the momentary switch to turn sound on. Tom uses the killswitch to control the attack of the note and make it synth like. It’s almost impossible to do on the momentary switch. The speed is much slower. I will probably include a toggle to flip the momentary to always off. So that you can hammer on and click switch at the same time. The only issue is that you guitar is set to always off. This is why the old school toggle method is the best. It just gets really tiring on your arm. Tom is a true artist.

To do try Jim’s spst method, try cap method and lower resistance to 4.7M.