REGARDING Plastic frame usage I have used a limited number of Pierco plastic frames for a number of years in the honey supers, but never in the brood nest. They worked well for me after the first season, when the bees had to be coaxed into using them. They are very easy to uncap, either with knives, planes or automatic uncappers. The main drawback I see is that they are quite heavy compared with wood and beeswax comb frames. I would be willing to respond to any questions you might have. Ted Fischer