Howdy ...
Have u confirmed wheels aren't buckled in any way or out of round?
Dynamic wheel balancers are far from perfect, used em for last 40yrs, on both bikes & cars, if not correctly calibrated (most aren't) you'll never balance out a heavy spot.
Personally I've found the cheap home balancer to be accurate enough, never had any vibes using one.
Did you get wheels balanced with both discs fitted, if not, there might lie the problem, any rotating mass needs to be balanced.
Check tyre is seated correctly on rim & is in fact a true/round tyre, u may have fell foul of a dud tyre.
Check fork legs aren't bent, this can put stress in the front end & mask as vibes at speed.