Chainsaw Repair

I've never ran any Dolmar done up by Randy. 

But I have ran some of Ed Heard's in Canada EHP 7900 and he does up some strong work saws using the stock parts that come with them.  Not like some (not talking about MM Randy) having to switch in other makers pistons, coils, thicker shims and  base gaskets etc to get the gains. 
You might also check with Dan Henry dozerdan in PA. I know he used to be a dolmar dealer and may have ported them too. Know he does a heck of a job on the huskys.