I have found that a couple of drops of lubricant on that plastic part under the cam makes a big difference to the action. I used lanox. My cam was feeling a bit sticky, the lid was not springing open like it should. Now it pings open really well. Keep up the good work.
Place a drop of oil on the plastic for the butane insert . On the lighter fluid Zippo cut a ziplock freezer bag after you fill it over the liter fluid insert it saves a lot of fluid I get a few weeks out of a tank ! I want the pipe lighter brass insert butane ! Fantastic Mikes plastic bag trick try it !!!