This might work for you: http://forum.slowtwitch.com/.../?page=unread#unread

(note: not my item to sell, just saw your WTB and their sell ad. I use the same k-edge TT mount and like it. The rotating base makes it so you have more clearance when inserting the headunit)

I Have a brand new never used Bar Fly TT. I ordered it a few yrs ago & didn't need it after all. Cardboard insert says its compatible with 200, 500 & 800 Edge.

I'm in Portland, OR. Reasonable offer ok.
Barb

https://www.amazon.com/Zipp-Quickview-Computer-Quarter-Twistlock/dp/B00E4TYOYQ/ref=sr_1_1?ie=UTF8&qid=1493839412&sr=8-1&keywords=zipp+tt+mount

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2020 Team Zoot MTN

Can you PM a pic? joecrawford at gmail.com