No seats stayed in so that's where the extra time went, plus there was two of us. Also, I knew what drill bit size to use and looked at your pictures for reference so that sped the process up somewhat. Thanks for the guide and picture on Instagram, it made it a much easier process! For anyone else fitting the popper in the carbon, when drilling we put masking tape below the hole in the body. We marked on this the location vertically of the hole and then pushed the bow protector over the tape tight. We drew a line round the outline of the protector on the tape. We added tape to the bow protector and marked a line that linked up with the line already on the tape showing position. Remove the bow protector and then measure the outline on the masking tape to the hole. It should be around 7.5mm to 8mm. That's your hole, 4mm if using a rivet or 3mm if it's a self tap screw. Hope this tip is useful for anyone else.