[babaloo]

Mornin...When I bought our 2018 Keystone Cougar, 29rkswe, the model came in 2 diferent styles. One was a newer 20th anniversary model with several 'upgrades', from the earlier 2018 models of same 5er. The 2oth anniversary edition had non-frameless windows, i.e. standard rubber gasquet. The salesmen told us Keystone had gone back to the non-frameless windows because the frameless ones broke easier and only opened a small amount, and sometimes pop-out !.
Anyway, that is what we we're told, and are happy with our framed windows which will open to any desired amount. Visually, the frameless windows, with their raw glass edge, seem a bit vulnerable to me....just my thoughts.