Hmmm....Very interesting. Non-suspended turntable does not need wall shelf or solid platform compared to suspended turntable???? Reason for putting suspension on the turntable to isolate the external vibration. That is the reason why non-suspended turntable sounds better with wall shelf or solid platform. Suspended turntable of course will benefit as well but not as much as non-suspended turntable.
OL RB250 is a good arm for the money, but not the best. I have owned OL modified RB250 and RB300. Definitely decent arms with the OL modification. Another clarification for OL using RB250 instead of RB300: According to OL and OL reps, spring in RB300/600/900 VTF adjustment has resonance problem in low frequency resulting less focussed/controlled bass and that is the main reason for RB250 having slight edge on the performance when fully tweaked.
OL RB250 is a good arm for the money, but not the best. I have owned OL modified RB250 and RB300. Definitely decent arms with the OL modification. Another clarification for OL using RB250 instead of RB300: According to OL and OL reps, spring in RB300/600/900 VTF adjustment has resonance problem in low frequency resulting less focussed/controlled bass and that is the main reason for RB250 having slight edge on the performance when fully tweaked.