I have tried one 29/26er, a perfect geometry match to the 26/26 I had ridden previously, so I think my opinion is valid. I'm not going to import a Carver frame, borrow a 26" rear wheel, just to try this specific specimen.
If your trails in your mind are too tight for a 29"er, get a 26"er. They're fine bikes, with a quarter century history. I've often seen that switchbacks not cleaned with 26" after many attempts, were cleaned first time on a 29"er.
Set up your KM with the rear wheel all the way forward, and ride it. This is mere millimeters longer a chainstaylength than on the Carver. Now add the difference, slide the rear wheel in place, bolt it down, and ride some more. Huge difference, huh? Personally, I just can't tell. We're talking millimeters on a meter+ wheelbase.
The Carver Mini accepts both 24" and 26" rear wheels. So for small kids it's fine to have chainstays half their body length, and not for grown ups? The extensive geoemtry sheet doesn't state what one owuld expect as the most important feature (short rear end) : chainstaystaylength. perhaps it's really not all that short?
Carver's XL (they also make XXL, which in itself is cool) has a 44.0" wheelbase. My favorite 29"ers I own in XL, with much longer toptubes, are SHORTER! Maybe they amde the front extra long and stable, to have the rear seem even shorter.
The mini's seat tube (top of seattube) measurement for some reason is in mm, odd. It's even not really much shorter than the "normal" XS, despite a really short toptube, odd too. I'malso pretty sure the BB drops though the sizing range aren't correct. The mini on 24/24 wheels could use a 165mm crankset+pedal as a kickstand

10 or 15mm shorter cranks on the XS than the XXL, wow.
Come to think of it, it should be relatively easy to make an adapter to stick a 26" rear wheel in a KM, keeping BB drop the same. Great way to void warranty and try something "new".
Sorry folks, bad mood.