Hello Chip, My name is John Shaw and I'm from Sunnyvale California, first of all I wish you a speedy recovery from your Heart surgery. I have been a member of the zipper club for 11 years now from a Aortic Aneurysm when I was 37. I had an Titanium Arotic valve and synthetic Aorta to the arch replaced. Medicine is amazing these days and all we can do is trust in our doctors. I am interested in the Trotec 300, is it still available? I would need to purchase the filter system, but your machine looks brand new. Please let me know if its still availble and we can talk more. Thanks, John