I had the same concerns when I did over the TT, it turned out to be a non-issue. I believe your slide and my slide work the same. I was surprised at how much extra travel the slide had when the faceplate was removed. I never unhooked my slide, I just gave it something else to land on, which in my case was a plank supported between (2) floorjacks. I never unhooked or adjusted anything on the mechanical part of it. It is adjusted the same today as it was the day I started this project.
Take a look at this picture - the slide is still mechanically attached to the TT, it's just cranked out farther than it is when the faceplate stops it.
These may give you a better view;
This one shows how far it's out, the header being supported is the outside wall;
And another view, with it out this far I had 100% full access to where the original carpet was fastened.
This might be the best picture yet, as it shows the new carpet installed in front of the slide.
Obviously yours wouldn't be torn apart as much as this one, but it's really not a hard job. I have about 400 hours into the rebuild on this one, 395 of them were a blast. :B
Moderator edit to re-size pictures to forum recommended limit of 640px maximum width.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910