There are 5 Zenair 601 HDS aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 2002 and 2014.
N601NR
2014 Vranish Randolph P ZENAIR 601HDS
Lake Stevens, WA
N601BF
2012 Foti William T ZENAIR CH601HD
Salem, OH
N52DT
2003 Trojan David J TROJAN-ZENAIR 601HDS
Kinston, NC
N169AP
2002 Paff Arvin ZENAIR 601 HDS
Buffalo, MN
N601DD
2002 Defelici Dan ZENAIR CH 601 XL
Houma, LA