Hello All, We are trying to develop a filter housing for a typical product see below however we are struggling with the ring that comes with this repair kit. because this isn't a real O-ring we don't know how to calculate exactly the groove wherein the need to come and seal. Can some help me or explain in what way we should think in developing a suitable groove for this " (sealing)ring"? How do you calculate the groove for this? Are there special calculators or formulas for? Thanks, BR.