Suspend the new tube inside the housing, using Nylon screws. (You saved, them, correct?
• Ideally, you would then re-tweak the mirror alignment once it’s mounted inside the housing. A filed down hex wrench can be used on the locking collar at the cathode/output-end but it isn’t easy and you’ll probably be okay to skip it. A better method is to carefully drill access holes for a hex wrench opposite each of the three adjustment screws in the side of the cylinder. Tweaking the anode-end mirror without getting shocked is the real challenge though and I would definitely recommend skipping it! Putting the end-caps back might help stabilize it a bit more, but you’ve won most of the battle already.
