Most of you likely have done this already, but FYI I went out and measured my 4720's top link fully retracted and extended. It was 19.5" retracted and 30" extended. When it was fully retracted my quick hitch was maybe at a 15 degree angle "toe backwards". When it was fully extended it was 30 - 40 degrees "toe forward". I dunno what function would ever need that much toe forward, so I'm going with the 18 - 26.5" CCM top link, thus giving me more useful toe backward (ie. to make dirt/snow/etc roll when blading), and less meaningless toe forward.
Can't wait to nudge that lever instead on getting off and spinning..... and spinning...... and spinning...... the manual TL!!! That's lazy I know, but so is a remote starter, but I'll likely do that too!!!
Just my thoughts.
-Jer.