Unfortunately the school doesn’t have quite enough equipment to get that done, definitely not discouraged though and I’ll see what I can get done. My current dilemma is getting the bottom unscrewed. It feels pretty much welded on, this should be funIf you're doing this for school and have access to a machine shop and a torch, why not use it as an exercise in how to make a tap? O1 and some scrap material to test it on(whatever the air shaft is made of) and you have a learning opportunity. They're not too difficult to make, just a little time consuming. I was never trying to discourage you from doing it, just wanted to let you know of any potential issues before you jumped into it.