Have added several hundred 6-1/4 in past couple years, mostly honey supered. Have had a few for several years in brood chambers as well.Ialso ,replace alot of wax foundatin with the pop in Pierco foundation. I find cells stay in better condition longer than the wax. When time to replace its not difficult to clean them up with a pressure washer. Alden Marshall B-Line Apiaries Hudson, NH 03051 [log in to unmask]