- I had the same experience as Kengta. My tank was out of the car and I spent the money for the right tools. In this case it was a rivet dimpler vise grip used to attach the CA rivets. It is a 3/32 Avery vise grip dimpler from Aircraft Spruce and Specialty for $49.95. It took less than five minutes to attach the flap. The spring was next. First attach it to the body and then use a pick tool (see picture) to pull to the door and yes wear eye protection and you will need to pull hard. So to echo Kengta - the right tools and room make the job relatively easy.