To start off, I'm running 2015 bandit trail series shocks. Well after 4k miles of abuse and reliable fun, my front right shock decided it was time to lose seal. There was a good helping of shock oil on my A-arms and the shock itself. I pulled it off and gave it a bit of a shake, and could feel the sloshing inside the housing. So, I get the pleasure of installing a new seal kit. I also saw that Bandit recommends changing the shock oil every 3500 miles (oops passed that). Having never done this, I'm debating on doing it all myself or taking it into a shop. Anyone have experience with this? Is it necessary to do a seal kit on all the shocks when changing the oil?