I like to keep an open mind in regards to everything. I am not claiming to know everything!!! When you ask a question you tend to lean to one side until some new information makes you think and possibly change your stance on things??? What's the problem with getting a feel of what others know in regards to a subject? I am greatful for the responses that I have received. Or at least the ones that are willing to share useful info. By the way, the question was whether Max squats could be replaced by heavy sled pulls?? The answer was no, but a person might be able to get away with it for a short time. With that info. I am willing to try this for a short time.