To put it in a cryptic way: The Triplanar and the likes (mounting
flange) are the only 10" tonearms which can be mounted on 9''
plinths. This means that Triplanar will not fit SP 10 because this
TT does not allow 9'' tonearms. Triplanar is 9'' qua mounting
despite its 10'' length. The problem or the deviation is the SP
10 not the tonearm.