If you plan on cutting holes in things and then putting cables through them you may want to consider getting some blow hole trim, its beading to stop sharp edges cutting things and as an added bonus covers up small scratches/mistakes in the cutting
Anyway link to some at chilled PC
http://www.chilledpc.co.uk/shop/prod...roducts_id=242
You can see it in use in my case below, its the black stuff surrounding the holes where the cables pass through the motherboard tray
