Has anyone done the installation of these crashbars themselves? I am talking about their new version that doesnt have any separate brackets (other than the bracket to hold the two sides together). I recently got them and attempted the install, where they advise you to remove a large bolt by having somone sit on the bike (or stand on its own against the wall) and have two (2) 18mm sockets on each side to remove the nut. It was a PITA to remove by myself but it was done. After removing all the bolts and nuts that were supposed to be removed, they tell you to mount the bars to the bike. Everything till this point is fine. But then when trying to install that large bolt back into the bike, I can not do it. The problem lies in the fact that the bars create a type of sleeve to go into the large hole that the bolt resides in to make it more sturdy. The sleeve, however, does not allow my 18mm socket to fit and so I can not tighten the bolt. I have tried looking around for a socket that might fit but I can not find anything. Any suggestions? How did you do it? Is there something else I can do to tighten it down? Here is a picture of the sleeve that is causing the problem. If more pictures are needed for context let me know. tl;dr 18mm socket wont fit in the hole. What now?!