30mm Spring Mounts for Sim Rig

These mounts are for 30mm diameter die springs to isolate the pedals, floor board, or seat in a sim rig with tactile transducers to improve the feel of the shakers in their mounted location and reduce vibration transfer to the rest of the rig.Compared with other methods (springs with bolts, rubber bushings, both of these together) using a free, but laterally constrained spring produces noticeable improvements to isolation and shaker efficiency.The various mount heights let give options to use longer springs for better isolation while constraining the lateral and longitudinal movement. 10mm of unconstrained spring will have under 2mm of lateral movement, even with ~100+lbs of force.25mm of unconstrained spring will have up to about 1cm of lateral movement with the same force. Yellow die springs are recommended. Their load rating of ~700N works well with normal sim rig weights. They are also cheap and readily available. 4080 M6x3 requires 2x 20mm M6 bolts and 1x 12mm M6 bolt.Outer dimens