Hi everyone...I had a question for you. I am building a TBH and it has a few mods that I could think of especially living in Colorado such as using a 50 gallon barrel cut in half for the inside then I framed it and used cedar slat fencing on the outside and sealed it and inbetween the two I used spray foam to help insulate. The winters around here are a bit hard and I thougth it would help with both the heat and the cold. Of course I was gonna do a ventaliation system to help keep it cooler during the summer as well as it will be shielded from the afternoon sun. My question is this..I have carved a sunflower greenman to put on the front of the thing and it was going to double as their enterance. I have drilled holes in the carved petals and inbetween the petals so it looks like the bees are coming out of the flower...I actually did it to look cool and to create a situation where if there are gonna be robber bees its gonna be way more difficult for them to find the enterance holes at all much less its gonna be way easier for them to protect. My question comes from the size of the holes that I have put into the carving. I just thought that it might be a bit small. I used 1/4 inch holes. Do I need to use 1/2 inch? im not sure and I don't want to make them so small that two bees cant get through at the same time...some of the passageways are a bit on the longer side. Any kind of advice or help on the subject matter would help. That includes on the hive design if I"m getting it wrong. I've lost hives due to the cold around here and I don't want to do it again...