Sorry, your tech is mostly wrong and you should go by the manual. The stabilizers are designed to do just that, stabilize the TT. That being said, it's probably okay using the stabilizers to fine tune level after you have it almost level..at least that's what I do. Leveling blocks are okay but I want it exactly level and I use the jacks, but not very much pressure. You want to level the TT side to side first, then raise/lower the hitch to level front to back.
After a few tries, you will figure it out.
And welcome to the Forum. There is a wealth of knowledge here for you to use. Happy camping!
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2009 F150 Supercab, 5.4L ,3.73, HD Tow Package, Equal-i-zer 1K,
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