CC, love the Stikas but I have broken a few, sometimes I hit hard things other than intended target. It is tougher than the douglas firs I shot a while back. It is the most forgiving arrow I have shot. The CX heritage has proven to be a very tough shaft also. I have footed an 340 Axis with a 1.5" 2018 aluminum shaft and it is as tough as nails, don't know what would break it. If your looking for tough this is it. I have a few alaskans and they are tougher the Sitkas but stiffer spined and need to be full length for me with 275 total point weight and 55# recurve.
With the 75 gr brass insert I can shoot 100-250 grain field points with very good flight, a little wobble with 85 and 300 grain points and the arrows are 29.5"
You can easily find the seam by rolling the arrow under a stress, Ed explains this well in the instructions he sends with the shafts. Buy them full length uncut with the 75gr brass inserts, and then bareshaft tune to get your final length, you will probably end up with around 30" with your 125 point, brass inserts and draw weight. If you want it shorter you will have to up the point weight.
I am currently playing around with the Axis and MFX shafts going for extreme FOC, have one now with 23% flying like darts 600 grain total.