*Why "D4"?  I usually get questioned,  and will get jumbled with A5 (which can be a climbing grade), and D5 (which stood for "Deuce5"), two models I are already involved with in past times.  My nickname in Yosemite was "Deucey", coined by Grant Hiskes  who mangled my Friesland ancestral title "Middendorf" to "Dusseldorf",  and Deuce4 is my pre