Great versus video. Those are my favorite. This was an interesting ported versus modded upper cc battle. I could see you may get some backlash for the end of your video but it's true, just because you love your old saw Betsy doesn't make it faster in a one-on-one.
Well I ported my first 2 saws. A 4218 strato that started with a 14 second cut stock. I got it down to 9 seconds with mods not including porting. Went from 9 to 7 with porting just widening and raising the exhaust, lowering the intake. The second one was a 4620 poulan that I had already optimized everything outside the motor and did a 6 second cut. With porting it went down to 5 seconds. I blew right through my intended number on the 46. Trying to port with a 1/4" air die grinder . Went from a 108.5 exhaust roof to 97.5. Fully expected it to fall on its face. Amazingly it didn't.