[kniteridr60]

Thanks for the suggestions, fellows. I have checked both surfaces and ensured their flatness by running a coarse-grit stone over them while thoroughly cleaning all residue. I've used the paper gasket twice but didn't use the gasket sealer you mentioned or checked bolt depth. I know I've got good pressure from seeing the deformed cork but haven't measured to the bottom. I guess that's next.

Any thoughts on machining an o-ring grove on the flange side of the recovery tank and using a high pressure o-ring? Thanks!