hi guys my name is john,first off all about myself i love woodwork but i am disabled, i suffer from chronic pain syndrome now for 4 years, but until now i have had no problems with my arms, so im looking to build a 1200 x 600 gantry style cnc machine. i have done a lot of reading on your forums and it has helped me loads and thanks for that, as all off you have said read up and take your time and don't rush into anything, but my arms are getting worse so i haven't the time really.
so im looking to build a mdf cnc machine, im currently looking at the build your own cnc machine,so what im asking if there's any better plans or upgrades i should look into, also places where i can buy things like lead screws and good bearings and info on what size lead screws i would need.

in advance thanks for all your help.