[Marcus26]

Hey
What I did was build the arrows totally, fletched and inserts added, and then at the end did my weight matching. I have a set of Easton grain scales and a set of RCBS 555 reloading scales. Some cheap digital ones are fine, but get ones that do 0.1 grains. Many cheap ones don't go that well. The RCBS are likely the cheapest but are manual.

I then weighed all my arrows and numbered them from lightest to heaviest

Then I weigh my points and number them heaviest to lightest.

so

Shaft 1: 295
2: 295.2
3: 295.3
etc etc

Point 1: 125.6
2: 125.6
3: 125.5

etc

So if I join the numbers I get

Shaft 1: 420.6
2: 420.8
3: 420.8

This will get you mostly even or within 0.4 of a grain. If you want them better then simply file down part of the inside of the screw in point to get it close. I use a dremal for this.
If you have a really light one, drop some solder into the insert.

Don't stress about getting to 0.1 difference. 0.3-0.5 is fine.