I received an aftermarket underseat storage compartment for Christmas this year. Anxious to install it, I finally got the Pioneer into the shop this morning and pulled the seat anticipating a fairly simple bolt in. Not so fast there buster! The under seat area is filled with electrical connections and what appears to be part of the heater assembly. You don’t have to get passed the 5th grade to see there is no way in hell this is fitting in that space. Is the storage box only for those units without a factory heater?