Hi, I am looking at buying a 24v psu to run the safety / emergency circuit on my cnc router. Any recommendations? There's loads on eBay but what is the correct amp to go for?

Same question for the 5v supply for the bob.

I will be building my 70v psu to run the drivers / motors, is it worth making the 24v psu or isn't easier / more cost effective to buy one?

Cheers!