Unless you are particularly adept and/or lucky it’s very difficult to get spokes to the ideal tension and even for any particular rim.
Bollocks. Unless you are tone deaf, you hve no real need for a tensionometer. I’ve built countless wheels with nothingmore fancy than a bike frame, bits of stick/ipties, and a spoke key. None have ever had any broken spokes, and all have stayeed true. From 26″ mtb disc, 700c lighweith, 1-cross Nexus hubbed (experiment with existing spokes; remarkably didn’t fail! 🙂 ), etc.
The most fundamental elements are taking time, paying attention and being methodical…
Telling every enthusiastic amateur that they have to thow lots of money at Park just helps preserve the ‘Dark art’ mythology.
+1. It’s wheel building,not rocket science.