From what I can tell, a X17Z has the jacks which are made from pressed sheet metal.
On my previous trailer a 2005 Jayco Jay Feather LGT 27P, it had the same jacks. It didn't take long for me to bend those flimsy things either.
I replaced them with BAL telescopic stabilizer jacks. They held up flawlessly and could actually take a load which was helpful in 'tweeking' the level of the camper.
FAA A&P mechanic, ex-RV dealer parts dept
Retired B-52 Gunner/Flight Examiner, B-52 Crew Chief
2016 Jayco Eagle HT 29.5 FBDS w/ 15,000 BTU AC, 50 amp service, upgraded counter top, thermal pane windows, elec. stab jacks, outside grill, backup camera and MORryde pin box.
2011 GMC 2500HD DURAMAX/ ALLISON