Hi Guys, FWIW--- After reading the threads on this problem, I went to my local home center and bought two metal garbage cans with lids. One is the largest they sell and the other one nests inside of the larger, with about an inch and a half of space between them. I then filled the space between the cans, including the bottoms, with sand (about 80 lbs.). In this configuration, both lids then go on perfectly. As of now, I have this setup in an outdoor shed resting on the bluestone gravel floor. The shed has electric outlets, lights, windows and a large shelf next to the cans for a charger(s). This should work well and safely for me during most of the year. During the cold months, however, I think I'll have to duplicate this setup in my basement, because where I live, here in the Catskill Mountains of NY, it goes well below zero a lot. Again---FWIW. Bob G.