These are some tips I learned from years of building and repairing my arrows. Hopefully they will be of some use to you.
Cleaning glue residue from shaft
I have found that a vegetable/potato peeler will cleanglue residue from carbon and aluminum shafts without injuring the surface of the shaft. I have not tried it on woodies. A little alcohol will remove any remaining traces. Be sure to buy another one for the kitchen.
Arrow collars
To help protect carbon, and possibly aluminum, arrow shafts from splitting at the nock end when the arrow strikes something solid, like a rock, it is helpful to add a collar in front of the nock. The commercial ones can be spendy. They also weight about 4 grains. No sure if this impacts arrow flight. I used a piece of wire shrink wrap on a carbon shaft that had split about 1/2 “at the nock end. I was curious to see how well it would work so I did not use any adhesive or epoxy to seal the split, just the shrink tubing. It has held the split together for about 50 shots. So, I purchased a 10-foot roll of 3/8” (.375) on Amazon for $12. I have applied a 1/2” piece on each my carbon arrows to hopefully prevent any future splits when hitting something other than the appropriate target. The cost for each ½” was 5 cents. The brand I bought comes in 10 colors plus clear. It also comes in various diameters. It can shrink to 1/3 of its original diameter so I think the resulting strength should be pretty good. A ½” piece weighs 1/7th of a grain.
Use a hair dryer or something similar. My first attempt at shrinking the tubing with a BernzOmatic torch didn’t work out so well.
Sanding the base of feathers
I have managed, over the years, to cut my left index finger a few times from the impact of the leading edge of a feather when shooting with less-than-ideal form. I always used to put an extra bit of glue on the front of the feathers after fletching. But sometimes the base of the feather was just too thick and it would catch either on the rest, or my finger. I solved this problem by using a feather clamp before glue-up to hold the feather and sanding it lightly so that it is paper thin at the front. It takes very little sanding and results in a very clean, smooth connection at the front end. Sand the entire length but put more pressure on the front. This will ensure a straight base on the feather. No more finger cuts!
Hope these tips are helpful