I agree with BZ, that hack is the cleanest since you can reconfigure it back to stock at anytime, no messy cutting wires in the cockpit or underhood, etc. I'd be very comfortable doing that to an FJ.
Ann, i've never done this myself for the same reasons you meantioned. There are to many instructions out there and i'm not sure to whitch one will work properly.
I did the cut hack long before the no cut hack with no regrets. Only issue I ever had was the t-tap worked loose so I cut it all and soldered it together. Been running it this way for 2.5 years now with no issues