The great thing of our M3W is experimenting.

Personally I think one of the best solutions is using a Stahlbus oil-drain as described in our bevel box project Stahlbus-drain-on-recon-bevelbox
You have them in several thread sizes so making a new bolt-thread or a coil is perfect, because it will be the last time you ever use this bolt-thread.

To protect this and the rest I made a stone guard Stone guard

see picture

[Linked Image]

One ant does not know anything, 2000 are a super-intelligent brain. That's like this helpful forum.