I'll agree with the last, and have "heard" of some of the same in the up gunning of those Russian tanks as well, the one that comes to mind for me though was the attempt I believe by the Danes to mount a 140mm on a LEO. Though I'm sure it would've been deadly but it just looked ungainly on a LEO for some reason.
Took a few minutes to go back and check...right continent, fairly close (That "horseshoes and hand grenades" saying comes to mind now!?!) country wise, but it was the Swiss and Germans.
Swiss on the more recent Pz87WE-140 program and the Germans working on the 140mm under the KWS III Program. Look under the
"THE IMPROVED LEOPARD 2 - LEOPARD 2 A5 KWS II" section of the following for Germany:
http://www.fprado.com/armorsite/leo2.htm
Apparently a newer 140mm was revisited again in 1999 as well:
http://www.fprado.com/armorsite/Leo2...-gun.kruse.pdf
The Swiss here:
http://www.army-guide.com/eng/product1645.html
Pics:
Have great end of the week!!
Regards,
Pat