Es tut mir leid, aber ich habe diese antworten auf english schreiben, mein deutsch ist nicht gut das story zu erklaren.
So.
StingRay is not an original model by Wingsandmore.
StingRay was designed by me, Giuseppe Ghisleri, and was published as a project from some polish aeronautical engineers looking for money to build a prototype.
This is not the place to explain why I did this.
Three views drawings were available on Internet and a german modeler built its prototype ( 3,3 meter wingspan )just before X Models started to produce and sell a smaller version ( 2,9 meter wingspan ) than my original one ( 3,2 meter wingspan ) wich was already flying well before WAM model that is based on the model of the german modeler.
My models were built by a friend living in Trento and, after having met that german modeler I told before, we thought we could try to build, for our use only, completely moulded models.
Some modifications took place to wings, tailplane and fuselage , the more important one was to choose a new, more efficient profile.
After a lot of flying time we are now confident that our StingRays can sustain every manouver in the book and then one more, you should have seen some video with those fast snap rolls .
In order to improve even more flying characteristics , last year a new wing with negative swept was designed, this has also a higher aspect ratio and climb better while retaining all the acro ability of the original StingRay.
That friend living in Trento will mould models for a selected number of friends.
Sorry about that, write to me I'll try to convince him to build some more models.