2100cd piston

Hey everybody, first post, thank you all for all of the information I have learned here so far. I just bought this Husky 2101, is this spot on the piston the start of a problem, or nothing, what do you think...

Sometimes in life things just roll as natural and smoothly as can be and this is a story about one of those times. In doing another collaboration with @Duke Thieroff we got to talking about pistons, like usual I mentioned the need for a decent replacement 2100 piston. The next day I was asked...