Hope this is the right place to ask. My pressure gauge on my triton II was leaking last week and I removed the top of the filter ( the large 8 " buttress I think it is called) and removed the gauge assembly dried it off and put JB weld on the threaded crack where gauge screws into plastic housing until my new gauge assembly arrived. The buttress removed easily and I regressed the large o ring before putting it back together. Today I went to install new pressure gauge housing and gauge, but cannot remove the top of filter (buttress). Have relieved pressure etc., but it won't budge. Anyone know of any tricks for removal? It is plastic so can't hit it too hard.