[crillyiv]

Doug,
I have a full width roll bar that was installed by the Olthoffs several years ago. I believe it is the same as what they currently offer.

I don't think taking it off and putting the original hoop back on is very practical. There are two holes drilled in the body for the posts on the passenger side. The hole for the downtube behind the driver's right shoulder became a place to mount a battery cut off switch when my car's roll bar was installed. I don't know what you would do with the holes on the passenger side if you took off the full width bar.

I changed my rollbar by adding a cross tube just above the rear cowl. This was done to raise the anchor points for the shoulder straps. The original mounting points for the shoulder straps was way to low IMHO. I moved the battery cut off switch of course. Hope this and the photos help.