There are 6 New Kolb Aircraft KOLB MARK III EXTRA 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 2005 and 2007.
N94548
2007 Allison Greg R KOLB M3X
South Saint Paul, MN
N615RT
2005 Tasker Lary D KOLB MARK III EXTRA
Cresson, TX
N30GL
Lewis Gayle A KOLB MK III EXTRA
Wisconsin Rapids, WI
N7800H
Sprague Vernon A KOLB MARK III EXTRA
Valley City, OH
N83NK
Labheart Norman KLB TW STR MK III EX
Pewaukee, WI
N85500
John Wise KOLB MARK III EXTRA
Gardnerville, NV