Get the 8.5mm and rout from both faces doesn't make a difference what thickness the mdf is then as you can adjust slot width to suit
I measured the following
6mm mdf 6.16mm
9mm mdf 9.07mm
18mm mdf 18.11mm
try these
http://www.anthonyaxford.co.uk/
they are based in farnworth and usually have a few species of hardwood in stock
or found this website a few days ago for UK grown hardwoods but haven't tried them yet
http://www.treestation.co.uk/product/hardwood-planks/
im just down the road from...
pivot point on bottom hinge need to be further away from gate than the top hinge pivot point
http://www.gatesplus.com.au/rising.html
take a look at the site, it australian but shows rising hinge concept
regards
Dan
when you right click on folders to view properties if there are lots of files in the folder it can take some time to tally the file size up meaning it could show 1gig for example and then jump to 20gig then to 40gig etc etc is it possible you clicked off the properties on a folder before it had...
it really depends what you plan to use the laptop for? what programs would you be installing.
if its predominately for browsing the internet/using office then 250gig should be plenty, most if not all new laptops will have usb3 ports meaning a 2tb usb3 external hdd is a possibility for media etc...
I fitted an Ikea kitchen a few months ago for a family member. One thing I found annoying was that the backboards of all the carcasses fit flush to the back rather than recessed making it impossible to scribe the backs of the units to uneven walls.
Also all pipework had to be run in the void...