I recently purchased a used EUB with a 5th string. It has been over 30 years since I've touched a bass and of course I played a classic 4 stringed instrument playing jazz around the New England area. Now I am re-learning the positions after buying an intermediate method book. So far I have ignored my 5th string as my method book does not know that it exists. I am tempted to write out some excersises for the B string but in doing so I'm afraid it will mess up my re-learning process. Eventually I may purchase a better instrument and it will be a classic up right. But for now the use of the B string is very tempting. Any advice would be appreciated. Contraruss