I think he just wants a single 100K resistor, which is why I can't figure out why pins 5 and 7 won't work, as I would assume the (+) already has a 100K resistor in series. I tried running a 100K resistor in series with the wire coming out of pin 5, but that didn't seem to change anything (torch still raised up about 1" off material).
It is a Burntables CNC, www.burntables.com feel free to give them a call and ask to see if this can be resolved somehow, as you 'technical' guys may be able to figure something out better.
The number is on their site (I don't want to post his cell #), ask for Kyle.
Thanks