too bad you missed it, woulda been a helluva deal... To clarify some ?'s about the earlier noncat version:
The actual firebox structure is exactly the same as the current production. The only differences are the fixed side door and ashpan handles, really. The early non cat also had the horizontal lattice work along with the vertical arches on the front door castings, like the cat unit did, while the current production is all vertical gothic arches across the glass.
The old and new versions use a removable handle to access the front door. This handle is the same handle that used to work the doors/damper/catalyst access panel on the original CAT version.... BTW the cat version was actually a pretty well thought out design, many folks do pretty well with them, still... the glass does stay cleaner on the noncats, however... burn times about the same, +/- 1hr or so IMHO.
Many of the structural parts of the old and new noncat versions are interchangeable, the only exception being the side door and ash door castings (the setup for the fixed handles is a slightly different mount than for the removable setup).
The biggest issue most ran into on the CAT and early noncat units was the air intake handle... for some reason, the handle would get real sticky, and hard to adjust. Powdered graphite would solve that issue (applied directly to the slider inside the primary), but the graphite would wear out by the end of the burning season, requiring reapplication...
As an interesting sidenote, the USA tech dept came up with a shorter, curvier chrome lever design that solved the problem. The Norweigan R&D dept checked it out, did some math, and said it wouldn't work, given the mathematics of the design compared to the layout of the slider. Screw it, said the Americans, and started putting some into the new F600 units coming in and it worked flawlessly.... and is now on all new F600 units (as well as an avail retrofit for older designs.) The American techs call it the "bumblebee" because, mathematically, the bumble bee shouldnt be able to fly, but it does anyway... mathematically, the American handle wasn't supposed to work, but it does anyway, hence the nickname.
Thats enough Jotul F600 non cat history for today. Class dismissed.