I absolutely love that tool ! I just hate the price and shipping and wait to get em. I have one and would love to get a few more at some point.
Easy to make, just delrin plastic at 9.15mm with an o-ring on the end.
Could make one for the BB specific for the SABOT-DDD.
Use the tool to push it out, tool down pushing up, when the SABOT-DDD is out, replace head, and flip the tank over and use the SABOT-DDD to push the removal tool out the bottom. The ends would be mated to match the SABOT-DDD's shape.
But unless you have a full tank its pointless as you can put the atty to the high side and all the juice goes to the low side. Just slip remove and insert next one.
I.E.
$3.59 a piece for 100 to be made 9.15mm OD x 60mm L
Dan