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Need to build a metal prusa i3 x ends and carriage for reprap

Hello there,
i need a basic diagram for metal x ends and the carriage as here, 3d services are two costly and there are no cnc machines hence i don't have any other option except for making it by aluminium sheets and so by the metal welders 

There are plenty of designs here on Instructable, just check the few already listed on the right under "Related".
Google also offers a lot of plans, both in metric and imperial to build your own printer.
And best of all: most include a complete list of materials, so you can select by what is available to you.
You can also take you old printer as a template and build a new one with the improvements you need.