What is boom? Is that the length of the downrigger? I have never trolled with downriggers just lead core but would like to try. I have a bass boat no way I need all 4 would you sell just 2? You in mt. Pleasant? I am in Columbia but my dad goes there weekly for golf lessons. I can have him meet you if you can just sell 2. Thanks. My dad has a center console so maybe 3 at the most. Is that cool?