...What is the best way to determine column width?...
I drilled holes for two settings...
For the 1983 911, because of where the lifting points are, I have to use the 116" setting...
For the 2002 911 (which I no longer have, but a friend bought it, so I still get to work on it ), I use the 128" setting... helps with getting in and out of the car. Same setting for a Boxster, Pontiac TransAm, 1990-1998 Porsche 911
Distance:
In the single bay I have mine at 115" (measured from the outside of the base).
For the second bay, I just rotate the middle tower (only one additional hole needed, so six in total instead of 5).
I have them at 128" (again, measured from the outside of the base) and it works great... easy access to the lifting points, easy to open the doors, still within the 130" limit in the install manual for trucks (even though I am using it for smaller cars), and I can slide the arms in and out without having a second person moving the car around. For the smaller car (FIAT), in the second bay, I also have a set of holes at 116" (measured from the outside of the base).
