At DPC we back-up everything we sell with free tech support. Call or e-mail us with your toughest supply or equipment questions and we will do our best to help get you back on track right away. You can contact our tech support at 877-881-4577 during regular business hours Mon-Fri 8-4:30 Pacific Time or e-mail us anytime with your specific questions at techsupport@dimensionalproducts.com and we will get back to you right away. Even if you have a problem with an item we don't sell, we can help.