Hey, while we're sort of on the subject. Why does the N20 traveler line have a twin tail and ties to two different spots on the back beam?

Many boats do this.
It is a better way of ensuring the traveller is held in the centre when under load upwind. A single line tends to allow the traveller to move slightly off centre.

Remeber that when you torque the bolt with the scredriver it could possibly break the tape on the end of the batten/tiller extension, so try an aluminum piece that is "u" shaped to fit the wrench into.

I've fitted all my traveller tracks by bolting the track to the beam and taping a ring spanner to a batten.
I put a small piece of tape in the ring and press the nyloc nut in. Then sit a washer on top and duralac on top of the washer to prevent a corrosion between the beam and washer.
It takes a steady hand some patience and an assistant to make this happen.
The invent of the electrc screw driver was a godsend for this job.

BTW:- I've just taped the spanner to the batten with masking tape and never had a problem.