There are DP props like Troops that have solid hubs, just like a Bravo 3 propset. Then there are ones that have rubber hubs. But they sure look like pressed in rubber hubs to me, not replaceable like what you are thinking F14.
Any Volvo experts? I am not, I have only seen about 3 different Volvo propsets and am not certain of their vintage. B3s are so easy, they are all the same, all solid, no hub.

Ahh, OK. Looks to me like you guys are talking about the hubs that you have to interchange props. The one hub, many prop thing.

Good to know.