i wish i had more time to help, because this info is interesting and could be useful.
1) Please stay away from Mr. Gasket. This is all i will say about the subject. (the fact that i said that this is all i will say about the subject in and of itself says something....)
2) You may want to email Carter; They have got to have something with lower pressure or know something you could use.
Sorry just don't have time to research.