@grune Even if it were "accurate" what does that mean? Can our eyes tell us how a mouthpiece rim will interface to our lips? It only shows the rim and cup - a lot of how a mouthpiece feels is in the bore and backbore however. We are sensitive to contours in 1/1000ths - how "accurately" can a 72dpi -150dpi screen image be.
The comparator for me is evidence that Kanstul measured many typical mouthpieces in a repeatable way. That makes it probably the best database out there. I can say however that the Kanstul Monette copies had nothing to do with the real thing - from "feeling" or playing characteristics. I am sure that the rim and cup were accurately measured - there is more to feel than the rim and cup...
I have made some interesting discoveries during my career.
- A gold plated mouthpiece "feels" bigger than the same size silver plated
- a well used mouthpiece with a scratched rim feels bigger than a brand new shiny one of the same size
- many players are dependent on a bit of "sharpness" of the inner rim for "grip". That dependency can be greatly reduced after weeks to months of embouchure building (Stamp/Irons)
- shallow cups greatly increase the need to critically match horn and mouthpiece - especially in regard to intonation
- beginners benefit from "sharper" rims as the vibrating surface is more clearly defined. Once the student has reached a certain degree of proficiency, it is often worth experimenting with less sharp feeling models
- it is impossible to look at a rim and predict anything.