no sense in cutting everything up,when five minutes to vent the carb diaphragm cover will give you the same tuned carb on the ground as in the air.also it may not take care of the problem for sure.i had to do this mod.on a 50cc profile with the entire engine expose,but it did cure the air passing over the cover plate vent hole.
i never had to do this mod for any of my planes until i started to fly round cowl planes,it takes care of the problem.
i like it so much that i do it as a routine for every plane i set up,just in case.