Haha, yeah, I'm pretty sure (99%). I pulled the original deluxe panel off and still have it. Plus the passenger side is still together and fits great.

I understand the skepticism though...it does seem like a dumb problem to have. Maybe I can pull a part number off the regulator to get that 1% more assurance.

Confirmed they are deluxe regulators based on the stud length and markings, so I've got that going for me...

reason I was asking is that is roughly the difference in length between the two regulators.

No worries mike, it's the right question for sure. It seems like that HAS to be the issue.

I may have missed it. What brand are you using? I have OER Deluxe and have yet to try them out.

I don't actually know what brand they are. They were bought off eBay 10ish years ago. They're curved, thick, and have a black ABS structure.