Ever since I bought my Tormach I wished it had Start / Stop buttons. On every machine I ever ran I spent the majority of time with my fingers poised on one or the other. It is now available from Tosa Tool.
Tosa Tool - Cycle Start / Slide Hold Remote
Attachment 207610
This rugged 2 button remote comes in an all aluminum housing, 5 meter cable, easy USB plug in, and simple software to configure it to your PCNC or other PC controlled CNC machine.
I run my PCNC 1100 everyday and I love it. The cord is long enough to sit on my desk while the machine runs and I am programming other jobs. The lighted buttons make them stand out where ever it is. Much easier to hit the green one to make it go, and the red one to make it stop. No more fumbling with the keyboard.
Buy one today, I will have it on your doorstep in about a week.