David,
You can take part at any Club events with a 100" Tomcat, it just doesn't count points towards any of the Club Championships as it doesn't conform to ALRC rules.
However if you are taking part in Comp Safari's than you can play for points as these are run as open events under the banner of the Scottish Cross Country Championship as so few Comp cars are built to ALRC spec these days. But there is still an ALRC class comp championship structure within the club. I think I am right in saying that apart from the ALRC Nationals, no clubs are running ALRC Spec only Safaris these days as the rules are to restrictive on what you type of car you can run!
