blown unit

I have old tilt and turn windows which I'm looking to replace some blown units and renew some of the gaskets on. Just wanted to check that I'm not being a dumbass, external gasket seems to be attached to profile, I can move the internal bead slightly with a decorators knife, do I need to just be...

Double glazed window unit(non opener) has failed and has condensation internally. I Removed internal beading and found window fitters never used any packers. Removed sealed unit from double sided glazing tape and it appears there are no drain holes. Is this correct? Is the double sided...