So I was sold a 36 AC from a Featool dealer, my question is, I'll be using mostly sanders and doing Lead RRP work, can I use a HEPA filter in the 36 AC ? And should I turn OFF the Auto clean if I am doing Lead work? Obviously I bought the vacuum to upgrade with a Planex later but I wanted to get the best vacuum and hope that I made the right purchase instead of just getting a non-auto clean 36 or 48. Thanks!