I'm going to take the next step in working on instruments and replace the active preamp in one of my basses. It is the same number of pots and same controls so it sould be easy. The one aspect I'm not sure about is how to handle a few splices. Right now they are wrapped in a black plastic sleeves. My question to the TB community is how do I get the sleeves off the current connections, what are the sleeves called so I can buy some replacements, and what is the the best why to install\shrink them after I make my splice?