12 glide bar adjustment

I just had the khromewerks 2+2 sweepers installed on my glide and after picking it up I decided I wanted to roll the bars back a bit, I have the maintenance manual and removed the tach gauges and couldn't get the screws in the upper clamp loose, I went to my local dealer and asked if they would show me how to loosen the screws so I could adjust myself and the guy at the service desk told me they couldn't be rolled back because of a pin that holds the bars in place and could only be drilled out, there is no mention of this in the service manual, is this true and if not how do I get the screws loose? Thanks for your help