Hi Gilbert, and welcome!
I'm sure some of our expert luthiers will be along soon to answer your questions.
In the meantime, may I invite you to tell us a bit more about yourself in the "Introduce yourself" section here
? In an effort to help thwart spammers, Mr. Delcamp now requires an introduction from newly registered members:
The accounts of new users who have not introduced themselves within a few hours of registering are deleted, and they will need to register again.
You will get a proper welcome and some tips on how to get the most out of the Forum.