If you do not have the standard stabilizers...the only stabilizer jacks that should be used on a large TT like the MXT is a scissor design like:
BAL Scissor Jacks Stabilizing System - Set of 2 - BAL 24002D - Stabilizing Jacks - Camping World
There are simpler designs with a single leg, but they are too light weight (made for pop-ups).
The scissor design can also be powered, but we just used a cordless drill on our TT's jacks...less wire, less risk of failure, and I already had the drill.
About slide-out stabilizers...I believe every maker discourages their use. The slide should be tight against the camper wall. If you jack-up the slide, the normal/slight flex in the frame as you walk inside the TT can pry on the slide seal and joints...not good.
Best luck and safe travels
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV