Upvc windows too big!!

[Wilko2602]

Can I have your views on which is the lesser of two evils . Do cut 30
Mm off the bottom
Of my Veka frames or chop 30 mm out of the stone cill How much will the former dingo the strength of the bottom profile
As this is where the cut would have be. Regards

 

[Maxsys]

UPVC windows are made to measure generally, i certainly would not cut anything off of the window.

Why is it too big? Did you just buy it off the shelf hoping to make it fit?