@alan60 I like yourself don't do equations, I have as a result of the route chosen to produce my HiFi System, been able to meet with a few very adept Electronic Engineers and Mechanical Engineers, and as a result of the relationships developed, have immediate access and support to be guided by these Professional Individuals, who have done much work with equations and designing/building as daily practices throughout their careers.
Additionally, I have a selection Book Marked 'go to' Web Sites, where the necessary info' about analogue replay requirements can be found. There is a substantial amount of info' at hand. I don't seem to have any issues with understanding these, even if infrequently visited, I can also run a few things over with the more learned than myself when needed.
It really is not difficult today for an individual to present themselves as a Expert, when the Calculators to do needed equations are readily available to all.
There are those who create math and those that interpret the math created, neither are able to find perfection, but usually the one who creates the math, has a better knowledge of why the math is as it is, maybe like the Viv Lab Designer.
The types create/interpret, are worlds apart, I have learned to stick close to those who do the math and are walking the walk in line with their creative thinking, experience has proven, these types are a pleasure to know.
I keep well away from the types that are talking the talk, when it comes to advice, these types, are usually flimsy and not well rooted, the story/stories presented has many twists and turns, as the talk is attempted to be proved/disproved.
I have spent time reading the Posts from past years on subjects of interest from a selection of the regular contributors to the Audiogon Analog Forum, and have no doubts that ideas and theories are formed in shifting sand, that reshape over time.
The good reports and positive Vibe on offer from the Viv Lab Arm users reporting on their 'experiences' due to having a 'sat in front of' encounter, has got my curiosity, hence my thoughts leaning toward creating a quite affordable underhung design that can be mounted on a Particular TT in mind, and used as a A/B comparison to a Overhung design using two Cart's of the same Brand and Model with very similar usage life.
This is not too strange as the same TT>Plinth>Cart's is put in place to A/B compare Branded Tonearms against the Tonearm Design I am now using and the Built from Scratch Tonearm. A very open mind will be present and evaluations will be on the qualities discovered to be on offer, not the Design or Geometry Shortcomings, which can be found in most set ups, I have chosen 'Stevenson A' as my poison.
