Thank you for your interest In the Sony XDR-F1HD.
Update 8/23/20: After a brief "reopening", I've been inundated with requests for upgrades. More than I can keep up with. I've committed to doing as many as I can at this time but I can't take any more in until I clear out the first group. Sorry.
I've upgraded, modified, and repaired nearly 500 Sony XDR-F1HD tuners since 2013. I'm proud of my work and I stand behind every tuner I work on with a "Fix It or Replace It" warranty: If something isn't right, tell me and I'll make it right. Your satisfaction is important to me.
Thanks to K6STI, K6JRF, and many others for sharing what they know about the XDR! I try to add something useful to the pool of XDR-F1HD knowledge and to extend the tuner’s service life for owners.