| I can't see 620's being ditched from the series. I have all the road bits for mine so it would go back to road trim and be sold but I wouldn't buy a 583, it just doesn't really appeal to me.
If I was going to spend money again, because realistically I'd lose the ability to leverage the investment I'd made in setting up my current bike and have to do it again for a 583, I'd rather buy an 800 and go to minitwins. Yes it would be cheaper to go to a 583 but I'd rather go that way to be honest. Changing that rule would just force my hand a year early.
That's if I don't end up selling the DD bike to fund a house and not race at all next year. | 
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