Quote Originally Posted by Voicecoil View Post
+1

I used 3mm ali in the one I inherited (thankyou Nealiboyee!) - advantages I can see include:

greater electrical conductivity( = better earthing) than weight for weight steel
greater thermal conductivity - used it as a heatsink for the rectifier, DC regulator/back EMF clamp, stepper drivers
Like the idea of using it as a heatsink, I hadn't considered that.