It looks like they have actually internalized the stuffing box, since they still use a shaft in the water
plus a shaft in the boat. So instead of having an accessible stuffing box, you have one now built inside their "tube" where it isn't so easy to reach.
On the other hand, that means they can use better(?) seals
and tighter alignment so it might work better in the end. Looks like the big savings in in layup
, since you'd just be bolting a "solid" tube through the hull
without having to so any shaft alignment, strut, etc. High tech permanent shaft seals (graphite seals, stainless seals, etc.) can run 10-20 years without incident so maybe that's good enough. OTOH, "out of sight out of mind" and inaccessible parts
...Kinda like one of them newfangled automatic transmissions in a car, huh?<G>