'deviant' (being different from an expected normal).
The OP's First Statement
"My observation however is that also ''deviant'' cantilevers which nobody would buy look STRAIGHT IN DE GROOVE. Ergo:: it is
the groove which determine cantilevet/stylus position .?"
Does not the suggestion put the notion in place that the 'deviant' aspect is quite noticeable and certainly not subtle, especially as the term "nobody would buy" is used to help describe what is being observed.
Does not the opinion formed "which nobody would buy", lean toward the notion, that this is a recollection of a experience encountered, maybe as a result of being involved in confrontation's on such a subject as a result of being a Vendor.
As said, my focus has been on the 'deviant' reference, and there in my thought is plenty to suggest 'deviant' and 'askew' are close in description.
The OP then later states
"People start with some assertion believen it to be true and act in accordingly with their assertion. My was that any deviation from straight meant defective cantikever".
At no time has it been presented that the 'deviant' has been referencing a 'deviation from straight' as being the witnessed form of the cantilever.
To cover this as an potential meaning to the vague description being offered. It has been suggested that a "deviation from straight", has meant a defective alignment that is noticeable on the cantilever, which is assumed to be a sideways movement, as this is the one that is most likely to be perceived as a self corrected condition when the Styli is placed in the Groove.
The eye will have a harder time detecting a Vertical movement on something that is already set quite different to the horizontal position, especially to a degree that is only slight in its movement from the optimised position.
A collapsed cantilever will be the most obvious when assessing the horizontal positioning and again the placing of the Styli in the Groove is not going to offer anything to suggest this condition has corrected itself.
There is references made to the likelihood of a Mineral Based Cantilever is not commonly seen showing a curve/arch in its form, along with the suggestion a curve /arch is a possible condition to be discovered in a Metal Cantilever.
Neither a Curve or Arch to a metal material cantilevers form is going to be appearing corrected when the Styli is set in the Groove.
There has been suggestion that the 'deviation' being referred to is noticeable and one that would be so noticeable, that it has the potential to create a situation where a Vendor would be met with a Customer that would not be willing to purchase, as a result of witnessing a cantilevers obvious 'deviation'.
The referencing the idea the knowledgeable Customer has expressed a cautiousness to continue with a sale, as a result of the likelihood, the cause of cantilever 'deviation' is from a loss of a optimised set up at other interfaces the assembly has and which the cantilever is dependent on for its own optimised function.
I have chosen to use the term 'askew cantilever' (to one side - out of line) for being the indicator other concerning conditions are likely to be present.
As said, the simple evaluation is that, other costs are likely to be incurred as a means to have the parts within the assembly investigated for how they are impacting on the alignment of the Cantilever. There is projected cost to achieve a Cart' that is once more set up as optimised and enables the cantilever to have a operational envelope, that is suited to the design. The askew cantilever is a indicator that there is a secondary requirement post sale, creating a road a customer is potentially not wanting to inherit as part of the journey to acquire a particular model of Cartridge.
From a personal standpoint, I do not fear buying a Cart' with an obvious fault, I do my due diligence put into practice and the forming an evaluation after having consultations, leaves me with a clear understanding of what I am about to put in place. I accept my ambitions for a faulty Cart' are with risks associated. I am also fully aware of the idea, the ambition may not be fruitful and ultimately be a waste of some of my monies. I also accept the idea, I am purchasing in a way that demands other monies are required to be spent to receive a appraisal and penultimately, the being informed the Donor is a satisfactory candidate for further works to be undertaken.
There is also in present markets, very few reasonable priced faulty Cart's from certain Brands Models. The very attractive trade in deals on offer for exchange models has made the donor model prices become more elevated, it does seem the influence on the price hike, is that models of interest are now being scooped up by individuals looking to buy into a Brands Cart' using a bought in faulty older model as the method using the Brands exchange policy.