VPI staff does favor JMW-9 over all other arms they make because it's more rigidly coupled to base and arm tube is more rigid as well. And that's the reason they spend more time and effort on improving the JMW-9 instead of their longer arms. Not my opinion, just stating what they told me over the phone.
Don't forget the JMW-9 Signature option. Short arm has its advantage, think SME V or IV.Vi. SME used to make long arms like 3012, but when they introduced the new generation arm (309, IV, V), they kept IV & V short.
Don't forget the JMW-9 Signature option. Short arm has its advantage, think SME V or IV.Vi. SME used to make long arms like 3012, but when they introduced the new generation arm (309, IV, V), they kept IV & V short.