I have come full circle on the Huben. 
No, wait — not just one full circle...: I'm running in circles. And I'm getting a bit dizzy....
(1) I rejected the Huben because of
it's length — I like compact bullpups, this one is
32" (81cm), about 4" (10cm) too long for my liking.
And I rejected it because of
the uneven cheek rest that appears misinstalled as it not quite parallel to the barrel (see photo).
(2) Then I came around on the Huben.
Because I now have a
short bullpup in my arsenal.
And I have been lusting for power and extreme long range, requiring slugs.
For that purpose I can allow a longer gun (still a bullpup, not a long rifle).
The semi auto is a nice bonus feature. Yeah, I can see how I would use that for hunting all the killing time.
I was even prepared to overlook that I can't take out the magazine.
So, I gathered data, prices, features, looking every day at some Hubens for sale.
Delicious temptation. 
(3) And after reading a lot of posts on this thread and others — I came another full circle.
And pushed the Huben off my list. Again.
Is a top flight airgun really demanding of me to fiddle with
each and every projectile
?!? Really?
I mean, I could (maybe) see myself doing the fiddling at home — laying my five Huben magazines out on my desk, and
in the peace and warmth of my home fiddle each projectile into its respective slot, pushing it in
just so. 
But wait! The Huben doesn't have removable magazines I can preload at home
!! 
I have to do the
fiddling in the field, with gloves, dust, in the hurry of quarry moving in while the mag is empty
!! 
Real convenient.
A deal breaker. 
Full circle. Matthias
PS:
Thank you, AGN members, for all your input and help over the years. Great thread. You rock!
Still WTB: •Bullpup
•That shoots heavy slugs well, and also pellets
•With externally adjustable regulator
•Synthetic stock and good looks in general
Later added:
•Barrel not sensitive to bumps like the FX's
