Outriggers Forest River parts

I would add them as a precaution. Mine was starting to have a visible sag.

When I ordered them that is what FR recommended.  Also from my point of view each support should go directly under the slide roller   there are 4 of them.

I was able to install the 4  outriggers which I installed mostly under the rollers of the slide out.  I had to carve away some of the aluminum channel using an Oscillating Multi tool so I could slip the end of the outrigger onto the channel,  I considered sliding it under the channel  but could not pry it up since it is very much integrated into the floor and wall,  did not want to compromise the integrity of the floor/wall connection.  I did add a backer plate which was suggested and added galvanized  bolts, locking washers and nuts.  I did not use the FR solution of long screws.  I added caulk to the screw heads and will touch up with black paint. All in all  I feel good about the outcome of the supports.

Setting on the channel would have left a gap between it and the floor of the slide-out. I cut my homemade outriggers so they would just fit to the inside of the channel. Instead of cutting the channel, the alternative would have been to put a shim between the floor and the outrigger. I would like to see how the factory installs them. Does anyone have a picture of a factory installed outrigger for reference?