Finally got to do a test cut with my rig, now that I know the weird noises are pretty much normal.
I'm quite impressed - now all I have to do is to figure out how to configure all the pre and post cut settings in DevFus Foam so that it starts and ends where I expect it to.
I think trying to read the 'help' will be fairly useless, so I might be in for some trial-and-error...
Thanks heaps again for all your help in getting me to this stage, guys. Much appreciated