I used a pneumatic air cylinder with a 1.5" bore and a I believe 12" stroke. The cylonder is mounted on the back wall of the coffin behnd the toilet seat. A cable runds from the cylinder up to and across the top of the coffin down to the Bucky. I used 1/16" uncoated steel cable ran through small eyebolts to attach the BUcky!That's a really nice piece you've built! Now, since no one else has asked, what did you use to drive that heavy Bucky into a standing position? Just getting one to sit up is an accomplishment, but pushing it's entire weight into an upright, whew, that had to be rough!