Don’t hear much about TD anymore. The forums used to be alive with conversation about him. I believe he use to work closely with Fisher on various Detector projects. Plus tuning Fisher CZs . He developed the Tarsacchi ( maybe misspelled). Wonder if he still detects and if he is working with any detector manufacturer now ??? I purchased his CD and that info and his write ups with fisher were excellent. Sure would like to hear him post on the forums again. Anyone got any info???