Is DECtape Read/Write Head "In-the-Weeds" Info Available?

Does anyone have "in-the-weeds" information on the DECtape read/write heads? I've got several TU-55 transports and a box of DECtapes (thank you very much Doug!) _and_ Michael's failed DECtape head from several years ago that I'm de-potting. I very much want to figure out how to repair Michael's DECTape head and will return it to him if I can do so. I've read the document that Al posted a link to in the discussion on DF32s: Message-ID: <1e97981e-05d9-f272-d2fe-10ae38da6668 at bitsavers.org> ... "remided me of the problems with rhodium plating on RF08 drives here on page 9 http://archive.computerhistory.org/resources/access/text/2012/08/102746014-… " The "Oral History of Grant Saviers" is interesting and gives a lot of information about various storage technologies that were used over the years. It reminded me of my desire to learn everything I can about DECtape _and_ DECtape transports. Maybe the CHM or someone else has interviews or tech data that helps answer my request? Bob