I've read countless threads about replacing the OEM carpet in motorhomes and the challenges presented by the flat floor slides riding over laminate/Allure, etc. In fact, I've replaced my carpet with Allure nose to tail. However, I've had two major challenges:
1) Since I wanted a flat look from the firewall to the bedroom closet I had to install 1/4" plywood underlayment where the carpet had been and then blend it into the steel floor of the nose section using leveling compound.
2) Where the carpet had been, it was naturally installed prior to the slides being installed so was tucked well down the "ramp" which the slides ride up on. Originally I cut the carpet back only to the "ramp" thinking that it could provide a smooth transition for the slides to ride in and out on. That hasn't worked since the glue holding the carpet down has let go and I'm now working to cut ALL of the carpet out from both top and underneath the coach.
All of this has resulted in the Allure being scarred in several places from the repeated movement of the slides. I'm not terribly concerned about the damaged Allure since I think I will be able to replace the bad planks once I'm convinced I've got the slides operating properly.
So... I have a couple of questions regarding how the HWH flat floor slides operate. I've found thread which speculate on the adjustability of them but usually point to the HWH factory which I have heard shys away from such adjustment in favor of sending Winnie owners back to the factory since they are the ones who install and adjust the slides. Then I hear stories that the Winnie factory quotes $400 to start with to begin to make slide adjustments. So I'm confused.

I guess I have two questions:
1) are these slides designed to have the floor of the coach support their weight when retracted?
and, if not
2) can they be adjusted to ride a fraction of an inch higher to avoid scraping the floor?
There appear to be large adjustment nuts on the slide mechanisms but a man's got to know his limitations and I figure if it were that easy I would have been able to find it on the forum somewhere.
Any insights are appreciated.
Rick