I'll repeat we are extremely pleased with our Simonized MS 460, now that it has had several tanks of fuel ran through it, it seems like it is even stronger than when we shot the "after" video. I've had my cousin who makes his sole living off of logging and has for 31 years run it, and he was amazed, he runs stock 660's and 440's 90% of the time, he was shocked that it would give his 660 a sound whooping. He wanted to keep it after running it, tried his best to trade me out of the saw. I'm stihl waiting on sneaking up on a buddies stock 372 husky. I can wait to see the look on his face, he doesn't run a saw much at all, but thinks he has the baddest saw in the country, which is true in these parts when a "big" saw for most people is a Stihl 390 or 460 Rancher. It has totally changed his view on modded saws. I imagine his next new saw will be sent out before it ever sees fuel in it for a port job.
I've had a chance to run a couple of walkerized saw, they ran good, but at least on our particular saw what set it apart is throttle response, our 460 is every bit as snappy as a 346 as far as immediate throttle response, it is immediate, prolly the best saw I own as far as throttle response.
River Rat is 100% correct if you send Simon or any or builder as far as this goes, give them the courtesy of sending them a immaculately clean saw to work with. Mine was as clean as it prolly ever will be when I sent it. It just cost these guys valuable time when you send a filthy saw. I can't speak for all builders, but Simon's work is meticulous and extremely detailed, it is much easier for them to accomplish the task at hand with a clean saw.
K5Alive, send him a PM, he can do nasty if that's what you want.lol