I've purchased 2510 Remington weed wackier.. I replaced the line had been using it 30 minutes once again line broke and needed to take the spindle off to retread line again experiencing NOT able to unscrew the cap off to thread it. I had ONLY finger tighten it I had asked a male friend he also said there's a PROBLEM with weed wackier... He didn't want to MAN HANDLE suggested I call... Etc no # available....