you can't get them from ENS but you could look elsewhere. the spring is only three bucks and is pretty consistent thoigh
There is a cobalt blue tank for the zen 2 - there are two types - what is the capacity of each?
For the Sidewinder upgrade, was the bottom plate switched to brass?
No, and if you have one with brass in the base, you'll want to get the original parts... Brass and aluminum will have a Galvanic reaction (battery)...
mini is about 3.8ml and the standard is closer to 5
the sidewinder will eventually have gold plated contacts, Haunted.
Try sticking another washer underneath the switch screw.
Repent - Need to make sure the Hole doesn't go thru the filler. Put the Top cap on per instructions ... this will even the pressure so it cant run thru so easy, Yes you need a hole in the die of the carto or a prepunched.