I have seen engleharts where the owner decided to make the ff holes bigger and to monkey with the soundpost construction and placement. It always ends in weeping and wailing and gnashing of teeth. The sound post diameter and ff hole size and shape on engleharts are just what the factory wants, and nails have no place on basses, especially to keep the soundpost in place. The most effective thing a beginner can do to make his bass sound better is practice. Even if your bass is not set up to achieve its best sound, your learning to pull a good sound out of it will only make you a better bassist.