I recently purchased a 1.7 track with the 9t drivers. I rode 135 miles with just the 9t drivers and no drop brackets because my dealer said the track would clear. During my ride I noticed alot of vibration coming from the running boards, more then with the stock 1.375 track. I also noticed that when I would hit a few hard landings the track sounded like it would hit the tunnel. Now for piece of mind I was wondering if you would be safe to just run the 9t drivers and NO drop brackets or run the 9t and drop brackets? Also if I install drop brackets I would need to drill out the other mounting holes for the front arm of the rear skid correct?