Couldn’t you have such visible/invisible eyes on the tube to hide the radius nodes, for example, if you only want to set the twist at the moment?
Sometimes you really have a lot of nodes and it would be handy to be able to hide a part without changing the shape of the tube if you switch the radius completely OFF.
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You’re a genius! I’ve been dealing with the same problem, but that idea never crossed my mind. Hope we can get this function soon.
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The hidemode for Controls combine with the behavior of drawing curves on surface or startingpoint at the tube itselve or even drawing curves without seeing controles, just like drawing 
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