My concern for feedback was more to the tone of his emails back to me.

I had already done some research and discovered that the main cause of ripping canvas is due to the pressure put on it when using the tool. His initial email (there have been a couple) was asking me how to fix it, rather than wanting a replacement. He did not say that there was a problem with the canvas when it took it out of the box. When I told him that he could do a patch over the broken bit of canvas (you can buy them from craft stores) that's when he started wanting me to replace the canvas for him. I think he's actually ripped the canvas himself, but wanting me to take responsiblity.

I just think I'm being done over but I can't prove it. Call it gut instinct.