I replaced last pm the drone Pierco frames used for varroa control. One design flaw with them is that they have these small grooves along the frame that make excellent hiding places for small hive beetles. I must have taken 30 SHB out of one frame! The bees can't get to them very well in those grooves. I wish they could be redesigned where they would not have those areas. I was wondering if the regular Pierco frames have the same grooved areas. If so, I don't think they would be a good option for here in the south. I can just envision a whole brood box full of those same type of frames, and how many hiding places that would give those rascally SHBs........