Waiting for my SVS 16PC46, been using very dated Stereophile test disc for set up on other subs but wanted to upgrade. Ordered Autosound test disc on line Nov 30 with email response and order #sent back immediately. No disc, no charge to credit card, no response to email inquiry about the order sent 3 days ago. Thought I'd look at the Stryker disc that I see mentioned. Could anyone discuss some of the differences between the two and post a link to site to purchase? Thanks in advance.