This series looks super fun and I hope to attend some races.

The rule you describe for glue on the tires of SPEC class trucks is more restrictive than the TCS rule and I wonder why? Essentially, TCS requires that the glue not be in contact with the track with the car at rest, but the illustration for your rule would keep the glue several millimeters above the track. If you are changing the TCS rule, it would be best to eliminate all restrictions on glue since what the TCS restrictions "accomplish" is to discourage people from racing their trucks on carpet. (It certainly has discouraged me, and I've heard complaints from 'Cuda and others.)

Your SPEC rules also allow open servo savers (TCS requires Tamiya) and allow open servo "drag links" (TCS requires the stock TT01E plastic part). Unlike the tire glue rule, I don't think anything can be gained by changing these rules.