Yup, but I never regret doing them. It's all part of a never ending learning curve..
Shortly about to try a couple of different pollen traps. Idea being sell it or use to make proper pollen patties for Spring. Mainly based on Randy Oliver's notes on using different pollen substitutes and nothing came close to real pollen....and also that my brood boxes can get clogged with pollen late summer and not enough freezer space to store them....so they go mouldy and get scrapped.