9.45 - start clearing and moving old shelves
11.00 - start cutting down uprights then assemble first GORMM unit
1.00 - start assembling second GORMM unit
2.00 - start putting in intermediate shelves to fit between the units
2.45 - straighten everything out and fit cross-braces (had to do this twice because I am rubbish at this stuff)
3.30 - units are assembled, in place and fixed to wall. Belatedly realise I need some end bars on them to stop books falling off. Cut some bits of scrap wooden strip (about 3/4" x 1/2") to fit and put them in place - I used a peg at the back and a screw at the front so that I could fit them in without pulling the units off the wall again.
3.45 - finished
Now all I have to do is have some lunch then start shelving books - since most of them are on my bed I have a fairly powerful motive to get it done today...