We've been running a vintage series at Caldicot for a few years now as a winter distraction from the main classes...
I ran my Tamiya Thundershot twice in the very first series we did, bit it just kept disintegrating, so I retired it permanently!
We use a minimum age rule for the chassis, but then leave the rest of the rules open, so any electrics basically...lipo's burn out the old school electrics way to quickly so it seems to work better that way.
And it does mean that often the quickest vintage time of the night is practically on the pace of the modern cars...in the hands of our top guys at least
The vintage racers do love it though...they always come off the rostrum smiling