I am sure a few of us suggested that you should look to what the BRCA micro class were doing when you started micro's at your club but you said we had nothing useful to add and deleted our posts. Never mind, glad it's working for you there, I might pop along one evening and join the fun
The BRCA micro EGM is taking place on April 11th so less than a month away. You might want to either join us (all are welcome) or wait for the new season's rules before implementing the current rules as there will hopefully be a few changes for the better of the sport.
I know one of the rules being proposed would definitely help you achieve some of your earlier objectives which was to keep the class cheap to run and competitive for those with RTR cars.