Those that desire accuracy need to learn that its paid for in known names.... not DD or crap like that...
You go to a smith, get a Krieger, Rock, Obermeyer, Bartlein etc...
You only do it once and smile. Instead of buying and selling this and that and so on..
YMMV, but the results are likely to be very much the same in the end. Proven will work, the rest are just a guess.