Thanks David for taking the time and effort! Really appreciated!
Especially the comparison to the Manix is nice to see: When it comes to cutting edge length
one essentially gets a Manix sans choil (of course the blade shapes are very different, while the handle ergos are somewhat similar... if one compares the Rock Jumper to YOUR specific, clearly modded Manix...
It also looks to have very similar handle shape and ergos to the Stretch, and I guess there are not many who would complain about this...
You mention that the Rock Jumper handle is even a tad wider than a Stretch behind the choil - great news, since this exactly is the only tiny thing I´d have changed in the Stretch (a bit wider in the front part of the handle)
Really only slight negative for me on this otherwise great design:Like you (?) - I am a bit disappointed that they did no make the blade as long as possible (you mention that 1/4 of an inch could be added, that would be like 6mm and bring the edge length to PM2 dimensions).
It does not really bother me in this model that I´d carry as a dedicated climbing/utility knife - the more compact blade might even offer a tiny advantage here.
But for a general EDC more edge would be nice to have. Especially since one of the two main advantages of a backlock with edge all the way to the handle exactly would be to get the maximum amount of edge related to blade length (the second would be that the hand is close to the edge in a regular grip).
And when it comes to edge length I see it a bit like with sharpening choils:
One cannot add
edge length (like you cannot get rid of a sharpening choil without reducing the blade height significantly), but one can easily make an originally longer edge shorter or, more practical, just shorten the edge in use by gripping the knife in a different way.
And since they exceeded the 3" legal limit anyway it would have been nice to have more edge
Top three going by pocket-time: Endura 4 in VG 10/Micarta-scales; Stretch 1 in VG 10; Endura 4 in HAP 40