One thing to keep in mind,
Unless you are measuring uptake rate, near zero, research etc "close"
is more than good enough.

Traces, K+, PO4 are fairly robust and their precise control within a
narrow range is simply uncalled for to keep a nice planted tank.
Running out, extreme excess can/may cause issues.
But if you have a 2-3 days supply, in most cases you are fine.

You'll find little difference if you add 1ppm once a week or 0.5ppm 2x
a week.

Will one ppm NO3 make or break any tank set up? Only if it's 1ppm vs
0ppm or on the upper range of 20+ppm etc.
Regards,
Tom Barr