For the record, it's likely that you can buy a ported 90cc saw with little use for $6-800. Yes, it's more than getting your saw ported, but it'd be much better have 2 big saws than one, and it costs a lot less than buying a second big saw and getting it ported.
Ported saws are awesome, but the added work didn't hold resale value that well. I think they have a good return on investment because they're more productive, and they're also just more fun to run, but you start with a $900 saw and add a $300 port job, you don't end up with a $1200 saw. So it's generally cheaper to buy an already ported saw. You let the guy who had it ported take the initial deprecation.
Just something to think about. For the record, I'm not saying that anyone shouldn't get a saw ported. I plan on sending one off the next summer myself. I'm just pointing out something I've observed about ported saws. It seems like a common tend with performance stuff, chainsaws or otherwise. It's much cheaper to buy someone else built 4x4 than to build one yourself. Of course the caveat, and it applies here as well, is that you run the risk of buying someone else's problems, and you may not get any type of warranty on the performance work.
