My traps are 8 frame mediums but are 7/12 deep instead of 6 5/8 I never saw a good reason to cut off the extra width on the boards.
I check mine about once a week, so that gives a big swarm time to start moving in, and say.. Oh Heck NO! and fly off..
When I do see one moving in, I leave it alone for two or three more days before retrieving them late in the evening or after dark. Haven't had one decide to vacate once I SAW them moving in..
Have the ability now, so I will get my minion to video me taking them down, and or moving in if I catch them in the act.