I picked up a lovely VM Strat this week to replace an Affinity Strat as I didn't like the narrower nut, I never realised how small differences in size can make such a difference! The VM feels so much nicer to me. Unfortunately it came without the tremolo arm but that's easily enough sorted however I read that the tremolos themselves are pretty poor on this model so am looking for advice on changing it. 1) Should I change the whole unit? If yes what would you advise I look at? 2) Would it be worth just changing the tremolo block? I've seen blocks in different materials, does that make much of a difference? I've done a bit of measuring this morning and the bridge screw spacing seems to me to be 52.5mm and the 3 screws which attach the block appears to be 42mm. Tremolo arm hole 6mmish. Really I don't want to spend too much but also want to make improvements where possible.