Yes, I've done this successfully on a table about as large as yours. I used my automobile tire jack to raise each leg enough to put in a few shims. I then repeated the process, leg by leg to add more shims until I raised each leg to about 1", enough to replace the shims with one of these at each leg:
https://www.amazon.com/Shepher...pacity/dp/B0835LH6C6
I still have these wheels on all my legs and can move my entire layout without any assistance.
Why did i do such a crazy thing? It was simply that I finished the train table before I finished drywalling the walls and installing a drop ceiling. To finish the basement, I needed to move the train table a few feet in several directions. That's why I encourage everyone now to finish their basements first before starting their layout construction
