hi martin
are daves are currently dual class "open" is 19t brushed or 13.5 brushless 1s lipo
or "stock" 27t 4 cell there isnt a massive difference to be honest ,we have no chassis restrictions or hop ups as were only playing really , more like banger ovals at times
but like you the "Dave" championships will not be affected (we have not had a schuey ready yet for our carpet meetings but were looking forward to locking horns
good luck with yours and let common sense rule
regards dave