David A.T.

Channeled structure could lead to higher stiffness. But yes, it would require a high density of bearclaws to get significant effect. just to share sample picture from my stock, a bit different than Hogo picture: it is European spruce. In later wood the defect seems bigger than in younger wood.

The wood dealer told me it is was coming from a bear. But should we trust a dealer story. It seems the question is still openned. Some recent research are available https://www.google.com/url?sa=t&source=web&rct=j&url=https://hal.archives-ouvertes.fr/hal-02267138/document&ved=2ahUKEwifv4GS1sH3AhWjRfEDHXx4DkIQFnoECAMQAQ&usg=AOvVaw2LdilTe8v00wFXbxIv95oH

Bear claws are just bear claws. Once they are done by the bear on the tree it takes several years to make annual ring regular again and it let a V shape on the rings. Due to the tree growth it is generally not horizontal. When the bear comes very often, every year, then the piece of wood shows a lot of figures once cutted. (Update : might be completelly false statement !) As far I know it was for long considered as a defect. But nowodays it can be apreciated to make the piece unique. One must take little more care when carving as it makes it more difficult.

Just saw that in the Amati auction. Is it common/working?

Thank you for the links.

72 years of mis-informations look strange & very long to me. I think there is a (litlle, maybe high) probabiliy that the owners post 1967 did further expertise and were so much disapointed that the certificate are not available (to avoid instrument value decrease).

The cello is the one described by Tarisio, with same pictures from the dealers https://tarisio.com/cozio-archive/property/?ID=48845 n 1949 Sold by Rembert Wurlitzer until 1967 Jacques Français from 1967 Current owner

bravo!

Thank you for the pictures !

bass bar : do you adjust it with a gap before gluing?

Thank you. I find that D and G strings are too bright. Despiau has specific shapes for low projection.

I personnaly find 8000 sampling enough. In my last project I found ring mode decreased by 9Hz with f holes. the bass bar increased lot by >20Hz the ring mode.

How many mm do you let above the heart? I have a cello with 81mm projection fitted with standard Despiau bridge. I am not satisfied and I wonder if I should order a specific bridge with heart in lower position -4/5mm. I have 17-18mm wood above the heart. I wonder if the change would be signifiant.

Mastro-Keamon made reviews of these kit here. https://www.youtube.com/watch?v=EwgXGO_NEL4 https://www.youtube.com/watch?v=eDIHDcrTFG0 It seems to be nice kits. Next step is to sell the violin kit with it and a glue pot.

String behavior were described by Mersenne. https://en.wikipedia.org/wiki/Mersenne's_laws