Thanks for your suggestions, Greg!
Unfortunately I can't leave the bricks in place and roll the dolly over the bricks. I must lift the dolly with the levelers, slide the bricks under, then lower the dolly. But, it occurs to me that I could mark the leveler positions on the ground. I'm not sure how easy it will be to line things up, however. The laser is an interesting idea that I will experiment with. Thanks!
Peter
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