First - windows look great!

As for "..8 hrs of my life wasted..." I am no so sure. If I were to count that way, I would have given up on SH3D long ago. Sometimes, you can spend hours trying to figure out little details without getting it right. I have countless examples. Not only SH3D by the way, it could be building a bunk / cupboard bed (in real life) as I am doing this week-end, or my own metier for that matter... But trying and failing - even when overwhelmed by the latter - is never a waste of time.

And again - the windows look absolutely perfekt!

ok