NONE of the ergonomic keyboards offer tenting beyond 25 degrees besides the ergodox.
While you CAN modify a few of them to go beyond that, it's a hassle, whereas on the ergodox, you just get the long screws, and you're good to go.
The close the tenting angle to 70 degrees, the better, but 55 is the maximum on the ergodox given the thickness.
70 degrees is approximately the neutral angle for your wrist.. therefore most ergonomic.
Show Image
(https://geekhack.org/index.php?action=dlattach;topic=53184.0;attach=123966;image)
https://geekhack.org/index.php?topic=53184.msg2004837#msg2004837 - Showman's pic (https://geekhack.org/index.php?topic=53184.msg2004837#msg2004837)
The Ergodox needs tripod mount threading! Granted Matias Ergo Pro has a weird layout that basically makes it impossible to switch out keycaps which is a real bummer :(
No, the tripod mount system is not good because at that tenting angle, there's no rigidity on the inner edge. It's best to have actual legs there which go all the way, straight down to the table.
Overall, I'd say the Matias is the way to go if you don't want to diy.. because all you need is to drill some holes on the inner edge of that keyboard to mount the long screws..
I've got 125mm under my ergodox's inner edge. 150mm total screw length counting the section going into the keyboard.