Will, how much was your Tormach in AUD terms?
In response Chris, I'm actually just finally heading down this path with an Optimum BF20L or Sieg X3 (I have both, but haven't decided which to convert yet).
I'm currently doing all the electrics at the moment and just building my controller box. My X3 came with a bunch of CNC bits and pieces such as a break out board, power supply, drivers and steppers. They are a chinese kit off ebay and to be honest, I'm not particularly impressed. I didn't buy them, they came with the mill. IMHO I would have gone for a 48v power supply, and steppers larger than 490oz but it essentially came free with the mill so I'm just going to build it and see how it goes and if I decide to then I'll switch out and replace bits and pieces.
My biggest gripe is the lack of wiring and technical information pertaining to the breakout board and the drivers. I just placed an order for a different breakout board from Homann Designs (
Homann Designs!, Your preferred CNC Supplier) for the sole reason that there is at least some support and documentation.
If I was starting out I would seriously look at his Gecko kits. If you want plug and play there is a lot of information and support for this stuff. The cost is actually quite reasonable and you know what your going to get. JMHO.
Regarding the actually physical hardware kits I'm building my own. Ball screws came with the X3 but will need the ends machining to length etc to suit my application. There are loads of info for the BF20L/G0704 mills, I'm not sure what the Grizzly equivalent of the MH28v is but the mill is slightly larger than the BF20.
Gotta run, will try to come back to this.