Added 100 grains of trimmer string to my arrows-Glen del target issue*****

[bushytail]

I tryed the weight tubes and had problems with the nock tuning part.Always got a nock high.Got it worked out in one bow,but not the bow that i have now.My arrows weight 577gr.without tubes.I figure that`s close enough to 600gr.(which is where i would like to be.)And i have good arrow flight.

[Overspined]

weight tubes and anything put into arrows can, and often does, effectively decrease the perceived spine of arrows. The CX package even says causes "minimal" spine changes.