>Does this one also take several turns of the cap to open
About 2 and half, some folks don't like that
but I rather have more turns to deploy than nib dry out or the cap screwing off in my pocket
I forgot to mention, when changing nibs as @TheDutchGuy noted, twisting the nib unit is easy but some reviews say to retain the small o-ring that goes on the nib nipple and not lose it. I retain the o-ring in place and had no issues, but not sure if it makes any difference.
The other thing worth mentioning is on the flex nib with plastic JoWo feed, i sometimes get ink starvation and have to use the piston rod to push ink from the primary chamber to the secondary and also leave the end cap a few millimeters open so the shut-off hole is open. The feed will flood and fill in the fins making it look solid on a side profile view, then I can close the hole knowing I have a few pages worth of writing. Of course, different inks may respond better with flow.
On the Regalia Sequel nib, flow is perfect and Ralph knows his stuff