Do I need one of these for a 24/40 case?

[Rocketbuilder]

The nozzle sticks out past the thrust ring, so it won't work. See here:
https://www.aerotech-rocketry.com/customersite/resource_library/aerotech_rms_assy_dwgs/24mm_mr_rms/24-40_f39-9t_assy.pdf

True, I didn't realize that. I guess maybe if it was a metal rod I could bend it to go around the nozzle? I'll figure something out.
I will be ordering the case soon, when I've made some more progress on my current (larger) builds.

 

[NAR29996]

The AT wrench has zero chance of gouging up or otherwise marring the surface of your closure.

I should mention that cannon plug pliers have teflon grips which do not mar the surface you're using them on. Mine are a bit chewed up after 25+ years of use.

 

[karlbaum]

I use a cloth rag, which is usually my t shirt to tighten and loosen the case. Spend your money on flying not tools you don't need.

 

[Daddyisabar]

For the 24/40 case I have also used a metal beer bottle opener I received for free at the New Belgium Brewery tent during the annual beer tasting festival. Once you close up the 24/40 case with a bottle opener you are more than ready for the easier to load high power motors.