Needless to say, the window is now plastered in place. Looks very nice...but no pulleys. The pulleys need to go right at the top because the cord has to pass above a non-opening side pane to reach the weight boxes. I have just drilled some little slots to take niftly little yachting type pulleys (27mm high * 11 mm wide) but I have run straight into the big 3" screws that hold the frame top onto the sides. Straight through the middle of all 4 slots.
Now one solution would be to get the builders back, get them to Kango-hammer all the plaster off, remove the frame, unscrew the 4 screws and replaster everything.
What I'm wondering is whether I can avoid this somehow by cutting the screws (having first put a few nails in elsewhere to hold things together). Would something like a Rotozip, Dremel or a small die grinder get in there and destroy the screws - or are these things only any good for wood and plasterboard?
(and are they such a GOOD THING that it is worth buying one anyway just for the fun of having it?).