Chuck -
Here are a couple pics of my top up with a roll bar. I did not have a picture of how the roll-bar insert was supposed to go, so mine is a little different.
top 1
top 2
I fitted my top myself. I ordered it after I got the car, had not originally planned to even have one. I had to do a lot of modifications to my top, since I have permanently installed my windshield in the official "laid-back" position exhibited by many of the original FIA cars
(....."gosh, I don't know WHAT happened, Mr. Tech Inspector....it was standing upright when I began the race

....some of the bolts must have vibrated loose, allowing it slip down like that.....you're not gonna disqualify me for THAT are you?)
I have yet to finish a set of custom-fabricated side curtains to match the laid-back windshield and top.
regards,
Jeff