Filippo,
Those are great looking bass, even by American standards. I posted your relative weights below based on the numbers you gave. First 2 listed are at the low end of your weight scale, next 2 based on the high end, and the last your 19.5". Nice job, take care.

Length----Weight---Std Wt----R/W
15.00------2.50------1.83------136.47%
17.00------2.50------2.73------91.53%
15.00------3.30------1.83------180.14%
17.00------3.30------2.73------120.82%
19.50------4.40------4.23------103.98%

Ben

**Note: These are standard weights based on research in the U.S. so not sure how they translate to another part of the world. You may be looking at even higher R/W in Europe.**

Last edited by Ben Adducchio; 05/12/16 03:34 PM. Reason: Clarification