I'd take a quick look at it, after all things do just wear out. If it looks like it failed prematurely due to the modifications I'd contact the original builder immediately and get them in the loop. Plus, shipping can be expensive and if its a simple fix I'd much rather have someone closer, who I know is more than capable, fix the saw and save the owner some money.
To go further, I have fixed things done by other porters that where an obviously mistake. I don't post any pictures or raise any fuss. I just make a mental note not to do the same myself and move on.