I ended up with an extra telescoping cover and decided I should buy it a companion for the bottom so I got a screened bottom board at the TSC. The entrance is not the same height as the entrance in my other hives, which looks like a standard to me. Before I take this thing back because of this, I want to make sure I'm right and that they should all have the same size entrance and use a standard entrance reducer. Is it a standard or is it not?