What tonearms are compatible with a Scoutmaster?

Why not simply upgrade the table and tonearm together?

An excellent tonearm and average cartridge will outperform an average tonearm and excellent cartridge all day long.

In theory longer tonearms offer an advantage.

Unfortunately, they present problems including rigidity and resonance issues in some, but not all, cases.

It's interesting to note that most of today's, what many consider, "reference" tonearms such as Tri-Planar, Basis Vector, Dynavector 507, Origin Conqueror, Graham Phantom, Schroders, SME V, Kuzma Stogi Reference etc. have an effective length of 10" or less.

Just an observation; not an endorsement.

The 312, of course, is basically one of SME's entry level products (the entire 3 series) and should not be mentioned in the same breath as the tonearms alluded to in my earlier post.

Unless of course one has very little experience which seems to be the case here.

As such it is a bad example and not relevant to this discussion.

Experienced vinylphiles know this; others as you read here simply have no clue.