We use plywood to run our mini ex down the property line between homes and hydraulic wheelbarrows do the running back and forth with the waste, and with the granular. Typical situations our workways don't get compacted much at all. I think you'd be looking at less than 10lbs per sq.in with full loads. I'm on a job now where the only tool I've used is my kx-91, its handled large rocks, excavated 800sqft. I had the truck back up right to the patio and loaded directly into it. No mess. My track loader has sat idle most of this job. I think the question to this op should be what 2 machines are best for hardscaping. Mini x first, track loader second. imo anyway.