The answer to your question depends on how centershot (or not) your bow is. Your bow has a cut in shelf and is closer to centershot than most selfbows, but your setup may still be too stiff. As others said, leave the shafts longer if possible, or use alot more weight up front. There's a free program called Stu Millers spine calculator which lets you input values for various arrow componets and bow specs and then it calculates the "dynamic spine" of your arrows and "required dynamic spine " of your bow. I put in the stats for your arrows and bow (guessing that it has it's shelf cut to about 3/8 from center). The program basically indicated too stiff. I realize that this program is not gonna be 100%, but it get's you in the ballpark. Playing around with options it looks like these shafts at 32 inches with 145 heads will be close.
I disagree with Koan that aluminum is too light. Your shafts alone weigh about 10.6 grains per inch, which is similar to many woods, and heavier than some carbon shafts. The beauty of carbon or aluminum is that you can add weight inside the shaft and swap out componets easily. Like any arrow, it's all about getting the stiffness you need at the physical weight you want.
