ChoppyChoppy
Tree Freak
Most guys won't do this. Guys can ruin port work on assembly and there's no way to make sure the saw is sound running after assembly. Been there and done that. Never again.
The saw I shipped to the East coast was never ran after porting before I got it back. Ended up having to put a new carb (almost cheaper than a kit and I had a carb on the shelf). Still leaks bar oil too, case never was sealed right. Runs good though.
Part of my job is small engine repairs, I fix saws everyday. Just don't have time or disire to learn about porting.