maybe a good idea to register for the meshcam email lessons in cnc, it gives you a good all round understanding from the machine to the bits
I will. Thanks

this is a good place to start, A sufficiently strong machine
I believe these guys made all the parts from scratch. Not sure if I have the resources or the background to be able to design my own parts but will keep reading

If you have an example of a complex part you wish to be able to machine, post it, it will give the more experienced machinest on here an idea of what you will need.
The things that I am most interested in making are these DROPOUTS :: Nova Cycles Supply Inc., BMX Sprockets | BMX Sprocket | Sprocket Sizes | Evans Cycles, maybe Road Cranksets | Chain Reaction Cycles etc.

The emphasis is on making these parts custom to each bikes. Making original parts and choosing the best material for it.

1. machine cutting area, what is the maximum travel you need in XYZ ( largest part you will build )
2. whats the toughest material you think you may use
1. x-axis = 500mm y-axis 500mm z-axis= 150mm
2. Stainless steel and titanium

on the more compex side, will any of your parts require a turret ( side spinning spindle for milling or threads ect ), or a 4th axis. If you not sure about this, post examples of the parts
Not sure yet but i think it won't be necessary for the part I will be producing