You may want to use the solvespace source to play a little bit with dimensions to make a tight fit. Do NOT add brim unless you want to have a fun time with a scalpel. brim leftovers will cut your string. Make sure you have a perfect adhersion to your build surface. I'm using buildtak, as shown in the pictures above.
Make sure the nocks fit tight, layer adhersion is good and the first layer doesn't cut the string. IF SOMETHING GOES WRONG WITH THIS PRINT YOU MAY HURT YOURSELF WHEN SHOOTING, SO PLEASE BE EXTRA CAREFUL AND TRIPLE CHECK EVERYTHING!