My door latch assembly has the treaded piece which goes out to the handle,, almost at the end of the treaded piece it has two nuts with a lock washer between them,, then the door latch which has a few washers behind it for tightening the door gasket to stove surface as gasket wears ....Well what is happening is I tighten the 2 nuts till the door closes nice and snug but after a few openings the nuts loosens up allowing air in threw gasket when shut.(I do the dollar bill test),, if you tighten the nuts too much then you cant move the handle..Just wondering if any one else with a Regency F2400 has had this problem with the latch assembly loosening after use ???? Thank you Mario