For the sake of saving a few quid looking for an alternative. Build was much much easier with this system, just like using internal nipples but with the added bonus that truing can be done without removing the tyres. Well done DT
If you to not get it right away, do not read further.
Excellent idea in all respects.
a) spokes can be a little longer, if you wish. Or they can be as long as usuall, if you are not that level of understanding of wheels.
b) truing is faster, more than that, it can be pleasure