I have a old Case 680 K extend-hoe backhoe. My garage has a 12 foot high door but hangs 6 inches lower when open. I have not had a big deal, lowering the boom and locking back in place. However my luck ran out and I damaged several roof trusses when throwing back into locked boom position. I must have raised the rear too high. Has anyone tried another method and left the boom unlocked on a concrete floor. Even with the boom locked I chain the extend-hoe in place because it will drop and go thru the back of the building. Also if not locked in place it may move to one side or another. I raise the front bucket all the way up and has a manual locking bracket over one cylinder to keep it that way. I had this machine for my property use only for 25 years and use it a few times a year. Its a monster but worked well to load a dump truck when building a large pond. I thought maybe someone dealt with a similar situation. I am getting older and guess my judgement proved it. With the tires on the ground I have about 5 to 6 inches to trusses. Thanks