Does anyone have any experience with the older style (5 years old) Ironmaster Quickchange Dumbells and Super Bench(same age)? I was wondering if there are any differences between the old and new. I would also like to know if the optional equipment that Ironmaster sells would be compatible with the 5 year old set. I would love to buy a new set for my son, but most of my dough goes to saving for college for two kids, and the rest of my dough tanked in the stock market this week! I emailed Ironmaster, but have not heard back yet. They seem to make a quality product.