hi I,m glad I seen this I just brough a pacific pt20 around the top of res where hex key is looks like it has a hair crack also it it,s scratched on top also around out let port has little nicks out of it.The packet was sealed I brought it to go into a corev51 build.I haven't even got round to leak testing it.The other thing that is now turned me right off is seeing in post here to leave the res cap of for a few days after running for 24hrs because of pressure how weak is the res.