A good start to the week by fixing all but one of the half-drop windows so they open and close properly, mostly the same problems – protruding screws, caused, I suspect, when I trimmed off the ends before fitting the windows.  The  one remaining one that wouldn’t closewas NS window 4. Some attention with a burr to the side frames resolved this.  More small jobs followed: fitting the steel plate support for the rear seat back and redrilling a couple of holes in the offside horizontal flat beading and filling and sanding the old ones.  Work turned now to the rear brakes, which seems stuck full on.  First job was to release the offside rear brake by disconnecting the rod to the crossshaft, this was realtively easily achieved.  The brake cam is free to move and operate the show, so was set in the brakes fully off position and the shows and return springs reattached.  The same job on the nearside revealed that the adjuster, which is tightened with a clamp bolt, is seized on the brake cam shaft on both sides of the bus so the shoes will have to come off again on the offside.  Unseizing the adjusters requires rotation of the brake cam into a position where a wedge can be inserted into the slot in the adjuster and the application of penetrating fluid and lubrication.  In order to do this, I had to disconnect the rod from the cross shaft to the brake cam, which in turn required the removal of an awkwardly positioned nut and split pin.  This was only possible by splitting the nut with a cold chisel.