Thank you very much, Adam, for your reply.
Yes, I use The MoSpline to control the whole setup more.
Please also note that I tried to find the "gap" usually closed by "Close Spline" to find the most matching area among all three splines. I have no "one-size-fits-all" suggestion, but I hope the set of options allows for the control you like to have.
Typically, I "play" with some settings to get a feel for the needed shape, and there is often a sweet spot.
Cheers