I purchased the RetraxPro MX for RamBox with BUG and MF gate for 1599 delivered. Installed it myself, a little fit-up required, no problems as my 2020 LTD didn't have any braces. Just installed it but my observations are these:
The drain system will need to be modified to work correctly,
The seal along the sides will likely leak,
There is a gap between the MF gate and the top which will leak.
the RamBoxs cannot open 100% as they push against the seals but they open far enough.
Having said that, once adjusted, the top seems to operate smoothly, and it's supposed to loosen up with use. It looks nice, and it has enough clearance for the bed divider. It is good quality as far a materials of construction go. There are limited options at this time for the RamBox / MF Gate setup, (that I found). I've had ARE and Undercover tops, both of which worked well however had to be removed in order to carry anything taller than a couple of feet, and wont work with RamBox / MF Gate. This Roll up style does use up some space on the cab end but doesn't require removal to carry taller cargo.
I'll use it and make some seal modifications as I go. Overall I think it will work out fine. The photos attached show the described points. the top bracket cant be moved back any further in order to make a better seal along the MF gate because it is already contacting the MF gate. Possibly it could be trimmed however the large gaps at the sides are still open.
edit: I also tried to lower the tie down rails but this was as far as they seemed to go. I may remove them and slot the holes so it cn be lowered more. after seeing other pics (however not with RamBox), it seems the lid sits lower than I can get mine.
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