bnc wordclock

Hello, I read a post from 2008 on BNC vs ADAT signals and I wanted to hear how it all worked out. My setup is going to be similar with 20 ft of lighttube from a ADA8000 to a Yamaha AW2816 DAR. I don't want to depend on a 48Kh signal on a 20 ft ADAT connection. The problem I see is a RG59...