Re: FilaWinder Documentation
The electronics kit is for people who think "That's just a bunch of off the shelf bits and pieces, I could do all that myself if I only I knew how to make a PCB." Here is a Thingiverse page of someone who did that, though he had his own PCBs made - http://www.thingiverse.com/thing:200577. Another example is Fredaxe on this forum (who also made his own PCB) and wanted to adapt the design to work with his ExtrusionBot.
Aside from the base, which is too big, you can recreate the laser cut parts on a printer. Just download the dxf files from the Filawinder thingiverse, and extrude them to 6.5mm. For everything else there is a BOM on Thingiverse with suggested suppliers - http://www.thingiverse.com/download:338741. You might be able to save on what is there, for instance if you already have the right sizes of bolts (mostly M3 in 10,12,16 and 25 lengths) you can save $15 from not getting them shipped online. If you buy them out of the drawers at the hardware store, you will probably spend more. Shipping came to over $50 total, which is a big part of why something as simple as Lyman's winder still cost me $80 to assemble. There are also small quantity costs- PTFE tubing is cheap if you buy 10m of it, but not as cheap it you only want 2ft.
Think of it like building a Reprap. You can buy a Prusa i3 kit from a supplier, or look at the BOM and pages on the RepRap wiki and do it all yourself. You can still look at the assembly manual. Once you have sourced everything yourself you will still have the same parts to start with.