When the BigFoot System was developed, it took nearly 3 years from the ground up. The idea of making a large stroke is pretty easy, just like making a large orbit pedal for your bicycle. Extend the distance from the shaft/axel to the spindle and you have a large diameter orbit.
Most of the development was focused on making this concept as vibration free as possible and making it easy for users of all levels achieve excellent results with minimal training. We ended up with a completely revolutionary counterweight system within the eccentric set - a design so well thought out that many competitors have copied it exactly. To balance the counterweight system correctly, RUPES - a tool maker - had to become a pad manufacturer as the specs on the weight and height of the pad has to match the eccentric set. The third part of the development cycle was to develop polishing compounds that will not absorb into the foam, keeping the balance precise and treating the user to a nearly vibration free experience.
Why the preamble above? Just to highlight the nearly 3 development cycle of the BigFoot System. The Anti-Spin was engineered into the polishers for a reason. It ultimately is a safety device which prevents the pad from over rotating should the operator run the tool in free air. IF the pad was allowed to free orbit, at some point the rotational speed of the pad can catch the orbital speed, and a pad whipping through the air at 4200 RPM - offset - not only can fly off, but the foam structure can become compromised.
Pad rotation itself is a tricky thing. IF the bearing had zero drag and if the pad was completely balanced, it would never spin. The tool would orbit but rotation would not occur. However the bearing has some drag and the pad is never completely balanced so the moment of the orbit becomes inertia to the outer edge of the pad causing it to spin in the same direction as the orbit. When the pad is applied to the paint the force inside the pad is multiplied which can cause the pad to want to rotate quicker. The faster the tool is running, the more this force is multiplied and faster the pad wants to rotate.
Why is this important? Because RUPES developed the BigFoot System (RPM/Pad Type/Compounds/Bearing Drag/AntiSpin Friction) to operate between speeds 4-6. At this speed, the force generated by the pad contacting the paint easily overrides what little friction the Anti Spin produces. This is easy to experience. Run your tool on speed 4-6 in free air, then touch it to the paint. You will see the pad speed up dramatically as it contacts the paint.
Finally here comes your answer
So with our system (pads/compounds/recommended speeds) there is little benefit in disabling the Anti-Spin. I would go so far as to say there is zero. However, many very experienced detailers have noted that they feel the performance is improved by disabling it and removing the slight friction the Anti-Spin produces. If you step outside our system (smaller backing plate, different pads, etc) you may realize a benefit from disabling the Anti-Spin. I cannot say for sure because it would be impossible to test every possible combination.
If you do not keep the back of the backing plate lubricated with dielectric grease, the Anti Spin shroud will eventually wear away anyways. RUPES official stance is not to disable the Anti-Spin but we also acknowledge that it will not effect the longevity of the tool and doing so does not void the warranty (at the current time / subject to change).
