Well my new 7900 from Brad arrived Wednesday
I had a decent sized Silky Oak log out the back of my house that I'd given it a run on after work with a 32" bar buried and LGX non skip and although not overly hard wood it was instantly apparent that this saw kicks my stock 7900's arse.
Today I gave it a run in the real world and to say I'm impressed is an understatement. Cutting cookies on Youtube for fun is one thing (I enjoy watching/doing them), but getting this saw out working is a whole different ballgame. The 14% odd speed improvement that Brad had noted seems more like 25% although today was the first time I have run full chisel on this property. It held up well too so will be using it again
This saw pulls full chisel skip way faster than my stock saw pulls semi chisel skip -
WAY faster...
With Carlton A3LM skip full chisel it cut that fast on a 32" bar and 7 pin sprocket (although trees were only up to maybe 28"?) that I actually cut too far into the hingewood on a few and was lucky not to lose control of the tree!
Fuel economy was also quite good which was something that had been a small concern but in reality the difference wasn't major although it was noticable. This was made up for with cutting speed.
The muffler mod also isn't overly deafening but when echoing off a tree trunk close to your head I have realised today that my already marginal earmuff/helmet setup aren't good enough with this saw. That's a damn fine excuse to get a decent Peltor setup like I've always wanted
I was also a bit worried that the saw may lose torque which some people had mentioned - absolute garbage on this saw and a testament to Brad's work.
The saw started, ran, and idled like a factory saw (all while sounding tougher!) and Brad's tune was spot on.
I'd like to thank Brad for -
1) Doing the work.
2) Doing GOOD work.
3) Being open on the forum about what worked and what didn't despite Spacemule's best efforts to derail it
4) For continuously updating me on what was going on (my PM box was overflowing - does this man ever sleep?).
5) Being honest throughout the whole deal even when he found postage to Australia cost less than he'd quoted.
6) For modding his first (and it won't be his last!) 7900.
7) For now secretly trying to buy a 7900 without anybody knowing. Come on Brad, you know it's true
You have been asking an awful lot of Dolmar questions since playing with my saw!!!
Good service is hard to find and I am yet to have one bad deal from the US despite being shafted on many business/internet transactions in my own country.
Brad is a credit to arboristsite and if anyone wants a 7900 modded I can recommend where to send it. I know there are other guys that do good mod work too but as this is the only modded saw I own I can only comment on Brad's work. If Brad lived next door I'd be broke and there wouldn't be a tree standing for miles. I'd also have the fastest Echo 290EVL on the planet.
The HD filter setup is also very very impressive. In the flesh it also looks pretty good, it does grow on you for sure. The fit of it is also second to none.
After today's work the filter hardly looked used. A stock filter would have needed a good clean in the same amount of time. This filter setup has placed Dolmar right at the pointy end for pro level saws and anybody now using filters as an excuse to drag down Dolmar's 6400-7900 need a good old fashioned uppercut
Only kidding but you get what I mean. If this was factory fitted it would be even better.
All Dolmar now have to do is release a similar setup for their 5100-S and they'll be right on the money across their pro range of saws.
Another thing which could be improved on the 7900's too that I've noticed in certain species of dry timber. Chips can go straight off the chain into the muffler bolt holes and come out glowing ready to start a fire. I've had to stamp a few spot fires out in dry chips around my woodpile. I've noticed this for a while but had wrongly assumed it was sparks off the chain from hitting dirt etc even though the size of them and the way they floated around didn't add up. OK in nice green forests but concerning in dry areas like mine.
I plan on stuffing the holes with steel wool.
Thanks again Brad and will get real world working vids up ASAP, hopefully next to my stocker.
It pulled really well in the wood. The new HD filter is indeed top notch. 
