Even if DCC promises that you need only two wires for your whole layout, of course they are going to be in the way. I had made a cut-out in the water tower base to avoid moving the bus wires. However, there was no way to steer clear of the wire for my under-layout desk lighting, and a couple of frog wires. I made a big hole in the joist to accommodate them along with any reasonable future cables.
The water tower base itself just barely fits between the joist and the Bullfrog turnout throw for turnout number 9. Indeed, I thought briefly that I would have to bend the leads for the limit switch. There are round holes for final screws after I’m ready to commit to the position. However, a thoughtful designer back in January made big slotted holes in the water tower base to facilitate alignment; they are even low enough that I could use a long screwdriver to get at them, rather than trying to manipulate a stubby in that confined space. That guy thought of everything!
Pembroke:87 