We do have a tech, although we have been letting a bit to much slide.
As for tandem we do a two car gap in tandem and our rules are designed differently then a serious such as DMCC. You CANNOT pass, you pass you are disqualified. You are expected to keep a two car gap but if this space increases you are not penalized.
The idea of our tandem is to give drivers the feel of competing heads up and seeing what there competitor is doing. It is no for door to door drifting. Without cages that is way to dangerous