These jacks normally have a little raised plastic collar as part of the molded plastic body. This seems to be the problem as it prevents
the jack body from sitting flush against the panel. This collar is about 1mm thick. I found that carefully
cutting it away with an exacto knife give you the added length for the jack to protrude far enough through the opening
to screw on the ring to secure it, when using the Excellway case.
Removing this plastic collar doesn't seem to have any major effect on the structural integrity of the jack.