i dont know if this will be of much help,but here goes,i think you can mount the air tank to the outside of the subframe,
right rear if sitting on the bike,i dont know what a switch
swapper is so i cant help with that,i have the sport bike,wire
harness that works real well,scotchlocks to neg side of coils
i did not use the pin connectors to solenoid,i cut and soldered
them,the harness laid out nicely,everything else just plugged
in,i mounted the switch off the right upper radiator mount,
just made a little straight bracket,i put the kill box at the bottom of the trunk,once it is set there is no need to have it out in the open,i had big problems getting the ilb co2 bottle
mounted,but its in,hope this was of some help