What tonearms are compatible with a Scoutmaster?

The more exotic the stylus, the less forgiving it will be from errors in geometry. The 10.5" arm is a balance between the lowest tracing error of a 12" transcription arm, and the lower mass and tosionaly stiicer, but higher tracing error 9" arms. 50 years ago when the Shibata stylus was first introduced to decode CD-4 quad(!) records it was immediately noticed that alignment was critical and longer length tone arms were more successful at quad and sounded better on stereo. This wasn't considered heretical, it was just high-schools geometry and physics. Nothing since has changed either the math or the laws of physics. Those who argue you must go 'up' in the VPI line clearly do not understand VPI's design philosophy of near infinite upgradeability. VPIs are a system that enables owners to enter affordably and upgrade as your requirements change. Exactly the point at which you are today. There are those that rail against unipivot arms supposed azimuth issues. In cueing, I would agree, but while playing an album, simply not so. I would further counter it is far more beneficial to enjoy the inherent lack of rotational issues and zero chatter of a unipivot arm's ultimate single bearing simplicity than the complexity of four sets of ball bearings in most gimballed arms. As for resonance, few would argue that in structural integrity - stiffness and low resonance - that the VPI 3d printed arm tube is less than state of the art. There are many successful vinyl playback solutions. Few, if any offer better results and better value than VPI. Go for the 10.5 arm. And get back to enjoying the music.

@panzrwagn I couldn't agree more. I recently upgraded my arm to the Fatboy Unipivot on my original Aries table and couldn't be happier. That arm brought it to another level. VPI does have a "Dual Pivot Assembly" accessory available for those that are concerned about azimuth issues. I never installed it as it appears the arm is rock steady while in play. 

@kbell 

Where could one get such an adapter to raise an Origin Live tonearm on a Scout 2 TT?