A lot depends upon how the mast and partners have been designed but in general wedges should be firm. I've dealt with those poured plastic partners collars which I don't like because they must always allow a nudge of rattle but poor as they are (yeah, I'm prejudiced here) they are better than something that will not support the mast and that, given their coefficient of friction, will be hard to set or to get out.
Rather than wasting your time on a bad job, make a set of nice hardwood wedges fitted to your mast and numbered so you can get them back the same way. I make mine with an inside L or corner for a lip that goes out past the partners' collar. That keeps a wedge from falling through before you get them all in.
G'luck
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