Trouble is, people looking to hire a set of rollers, are generally only interested in DD

So even if you have a good product, its just not what people will be looking for, so commerically its very much the name to tag your business onto.

Bit like if i was going to do a tool franchise I would want it to be snap-on even though other tools are fine too.

If you were to charge 10 pounds an hour less to try and get same amount of business on a non dyno dynamics rollers, then based on 20 hours a week average utilisation over a 5 year period, thats 50K you'd be down on revenue anyway