Fitting the side window into the frame was a tricky, multi-step affair. Different steps than the front frame - because the front was easy to access both inside and out with just a few paces. I didn't fancy a 20 metre trek every time going from inside to outside for the side window, so did it all, bar marking the hinges location, from the inside.
> pre-cut a 3mm spacer strip on table saw and fit that into the upper frame as a spacer so the hinge barrels don't snag on the frame;
> offer the window up into the frame and mark where the hinges will be on the spacer;
> remove hinges from window and screw into frame - on the pre-fitted 3mm spacer - the front edge of the spacer provides a perfect guide for the hinge line so that all three hinges line up parallel and on a single axis;
> using a metal spring-jawed small quick-release nylon strap - suspend the window outside the window cavity - in the fully open position - horizontal to the ground - in around the right place to fit a single screw - then fine tune the position on the strop to fit another screw in a different hinge - which then brings all of the hinges and screw holes into line so the remaining screws can be fitted.
> after that the internal beading can be cut, fettled and screwed into the frame, along with the window stay and pins.
Pretty pleased with how these turned out.
Not perfect, but strong enough, secure enough, water-tight enough. Neither window gets any direct rain anyway, with the side window only getting as few indirect splashes from the tree branches.
Much of today was spent deliberating and pontificating about how I'm going to build a worktop area in this part of the shed. The idea is to have the worktop at around 100cm (I'm tall) - with the drawers and tall table still in about the same position. I know the size of the worktop, but the thought process was slow to formulate on how I'm going to put it together.
With the intended height of the worktop - not far below windowsill level, there'll be plenty of storage space underneath.
I just need to be able to wheel out the table saw (Evolution Rage 5-S visible stored folded up under the side window)