Right, now I've caught up and Tony's explained his thinking, I'm going to respectfully disagree with just about everything above, including my previous post.
Two Terminal blocks, (most are + and - but you can simply jump them), so lets say 15 set's of droppers, that's 30 wires, going to 2 or 4 Distribution Boards,
neat and tidy ? it'll look like a flipping spiders web.
Simpler to run a buss wire in a loop underneath in line with the track above and connect the dropper wires to that as, and where, you need them.