We do structural repairs, foundation leveling, and underpinning for older properties experiencing subsidence. We typically use hydraulic push piers, but on several upcoming historical restoration sites, the geotechnical reports strongly recommend helical piles to reach competent load-bearing strata without causing vibration damage to fragile masonry. What compact piling rigs do you recommend that offer precise torque control without causing high-impact vibrations or tearing up adjacent paving?