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Double Bass Old vs new soundpost

What's wrong with the soundpost? Is it chipped, or cracked, too long, too short? As the bass ages, the top can expand or contract slightly. This is usually fixed by a simple adjustment. If there's nothing wrong with the post, there is no need to replace it, doesn't matter how old it is. It may just need repositioned.
Also, the Diameter on a sound post for a 3/4 bass should be about 3/4 inch.
 
Grunnert makes an odd sound post which is actually conical (not comical). He says the back reacts better to thick sound posts and the belly reacts better to thin ones, so he solved this by making asound post ehich starts thin at the belly but fattens along the length until it's quite a bit wider at the back! I find this all a bit odd. Out of desperation I made my present sound post out of a broom handle and It's much better that anything I had the maker put in there! I guess you just have to try what works for your bass.
FC