Our aluminum roll-up tube is corroded and parts are hard to come by right now and we'd like to use the pool. How can we manually remove the cover ourselves so we can use the pool (our cover is encapsulated if that makes a difference)? We realize we'd have to leave it off until a new drum came in. The new roll-up tubes are apparently made of plastic so they don't corrode. Luckily it didn't rip the cover when it fell apart. Thanks!