just put on a new accufab fpr and the fitting on the end of the vac line fits very loosely on the regulator, zip tied it but it still seems not as tight as it should be and not as tight as it was on the old billet style regulator that i took off, do these vac line fittings stretch after time and is that all i need is a new one or is this common with the accufab regulators?? thanks