I have updated the video I linked yesterday to allow you guys to see what I am up to. This gives you a MUCH better idea of what I used, how and why.
Please don’t be like me with this. Drain your tanks and keep an idle compressed air system depressurized!
-- My workshop blog can be found at http://daves-workshop.blogspot.com, YouTube Channel https://www.youtube.com/channel/UCoa-AgyeFWqnQfGIJwdzkog