I have decided to use foundationless frames with popsicle stick guides in instead of plastic frames and I am leveling my hive. The ground is quite rough and it was a bit more difficult than had I anticipated. I used a level and the best I have gotten so far is the bubble in the level is not exactly between the 2 lines but it is 3/4 of the way in. Is this level enough? How particular do I need to be for foundationless frames? Thanks for your help.