FYI - when I put in my new mast, the only wiring reused was my wind sensor. One month after the install the wind started being intermittent and I ended up replacing the cable to fix the problem. Stupid of me to reuse the cable from the old mast.
If the mast is coming off, do yourself a favor...
I'm familiar with your installation since my hands have been on most of the wiring :-)
The ITC-5 option mentioned is probably the least expensive and most flexible. Assuming the problems you are seeing are not the sensors and associated wiring, the ITC-5 will be fine. If the issue is with...