Thanks for the advice.. yes always active would be safer but I'm not 100% sure about the controller board I have and how easy it is to wire as such.. I believe it's similar to the earlier version shown here. Although mine is a v3.9 with extra jumpers.. I was just following on from the way the E-stop is wired from the factory.. but I can of course change this.

http://i01.i.aliimg.com/img/pb/438/2...277438_868.jpg


Perhaps for the limit switches I could use a relay instead and wire the switches in series.. Would this be a better route to go down? Or am I better off using a FET to switch rather than a mechanical relay?

http://oi65.tinypic.com/ok5vg7.jpg


I've not looked into the proximity home switches yet.. but the ones I have are 6V-30V so I was hoping to use them..