I started turning with Technitool and have four of their chucks and just about all their jaw sets. I ran into a problem when I found the 'Cole' jaws were not large enough for what I was doing. After checking out all the chucks and accessories out there, I picked up a Vicmarc VM120 with the 14" and 18" bowl jaws. The plus of Vicmarc is the almost perfect engineering and machining, and no one has bowl jaws this large! The plus of Technitool is that all jaws (save the Titan large set) fit all chucks. All Vicmarc jaws do not fit all their chucks, but besides that, I really prefer the lighter weight of the Technitool line for blanks under 80 lbs.