Baroquecello, I hope you don't mind that I copied and pasted you onto the new topic.To answer your question Baroquecello, I do hear a better response in the lower strings on instruments that have had a CF rod installed but it would be a lot for me to recommend that in your situation without seeing the instrument. For example, you may have lost some of that power in the low end due to a soundpost that is too short since it's a new instrument. Also, it's not uncommon for necks that are new to lose some of their projection. A centimeter is quite a lot though. Did you have a new bridge cut? I think you possibly lost some power due to a projection drop. If you had the neck reset, I would guess that the neck is done settling and would probably hold the projection better.
You asked about Burgess's solution. I'll let him expand if he likes, but I don't think he uses CF rods at all. His solution, as I understand is to put dowels through the heel of the neck. That might be over simplifying, but I do think it is pretty effective.
One thing I would like to try is L shaped CF rods. I visited Jim Ham's shop in Victoria a few years ago when I was there for vacation. He had some rods made that were shaped in an L shape and the fibers were continuous. This would act sort of like Burgess's method with a rod going into the heel instead of a dowel, but also have it go up the length of the neck too. Some guitar makers will do this with two separate rods. Guitar makers tend to be much more experimental than violin makers.
I would be interested to hear other opinions about carbon fiber reinforcements in the neck. Have any of you tried it? And what was your experience? Does anyone have any thoughts on the fact that it's pretty non traditional and does that bother any of you makers?