no worries KB, well looking at the photo of raw materials I can remember the parts list.
1) 2 pieces of 70 x 30 x 1200mm pine (for base sides and backboard which supports necks)
2) 2 pieces of 40 x 30 x 1200mm pine for (2 bottom rails)
3) 1 piece 89 x 19 x 1800mm pine (for both side uprights)
4) 3 x 1 metre lengths 1.5" or 1.75" (not sure which) K-flex insulating tube (to cover bottom 2 rails)
5) 2 x 1 metre lengths 0.5" K-flex insulating tube (cover the dowelling)
6) 3 x 900mm long x 16mm diameter dowel
7) 50 pack of 65mm timber or chipboard screws - could probably get away with a 25 pack
8) 8 x 50mm screws to screw uprights to side of base (into 30 + 19mm) so could use 45mm long screws
9) paint of your choice, I got British paints satin black have a primer and paint in one, cost $7.45 each

from the big green shed all this came to about $83 and you will be able to fit 12 guitars - mine 10 electrics and 2 acoustics had to be spaced further apart.
I will draw a clearer sketch of dimensions next few days and post here KB

You will also need a 16mm spade drill to drill the dowel into the 30mm thick backboard and some glue.