miamijd, on 2017-April-25, 12:35, said:
Muiderberg is a treatment for the 2H and 2S bids when you use Multi or Meckwell. It's very similar to Meckwell's treatment; the only difference is that 2H shows H and a minor rather than H and another suit. Not a big difference.
Mini Multi usually refers to using a 2♦ opening to show a weak 2 in a major without any strong hands being included. You appear to be using the term for something more specific so perhaps you could start by describing what you mean here.
Muiderberg allows for a 4 card minor on the side and is not restricted to 5-5 shape, which was what you gave previously - that is a major difference. The 5-4 version of your recommendation is generally, in the UK at least, referred to as Woo Twos.
Vampyr, on 2017-April-25, 20:45, said:
This is also what I would expect, with 3♠ showing a minimum with short clubs and 3NT short clubs and a maximum. It is reasonable to play one-over responses when using a relay for runouts rather than good hands but doing so in combination with 3M pass/correct makes little sense. The third build that one occasionally sees is Opener rebidding the short suit itself; the expectation in this case is that Responder will then set the suit, returning to natural bidding, rather than continuing within a relay structure.