Tony, It sure is good for a chuckle when you get to run a modified saw against a ho hum with ho hum chain. My son got one of those days a few weeks ago. He responded to a call for the Fire dept. A bit of tornada had gone through and blocked the road on the way to the fire with three downed trees. He threw the 066 with one of my square filed chains on it into his private vehicle. When he got to the blow down the other firefighters had out the two department saws. I think they may have hit dirt a bit and one derailed the chain, anyway they werent making too good progress. Brian grabbed his saw out of his truck and started helping. That 066 has the muffler opened and is probably a bit faster than average. Well it wasn't very long till they shut the other saws off and hauled wood.
The casual user just doesn't know what he is missing sometimes