ak3blade---I am not clear as to the problem you experienced with the inserts--were the shafts not cut squarely before the inserts were installed? Or are you referring to the angle between the taperd adapter and the broadhead? I just took my shafts to the local shop and had them cut to length with a regular arrow cutoff saw.
Some tips I picked up may help. A fellow ganger mentioned that plastic wrap would hold an insert well enough for tuning purposes. I tried it, and found that a narrow strip (3/16-1/4 inch) draped over the back end of the insert as it was pushed in worked well. It held while pulling filed points out of 3 different types of foam targets, yet could be purposefully pulled out using a standard threaded insert tool.
I glued my inserts in with JB Weld----and found that impact on solid stumps broke the rigid bond on several arrows: the shafts were not damaged, but the insert backed out. I cleaned them up with a small file and re-installed them with Quick-Stik ( a new hot-melt from Kustom King)---so far this have held up fine---I think the material is resilient enough to withstand the impact.
jscturkey----I think 1shot1bull is probably correct ---The Alaskans may be underspined for your set up---esp. if you bow is centershot. I am using them on a longbow--56# at 27 inch draw---cut off to 28 in. ---with 225 gr. of head screwed into the 70 gr. insert, and 4 5in fletch. I am presently experimenting with an increase to 250---but I think I have problably reached the limit. The things sure fly right, I have lost a few, but have not broken one yet (except the one I hit broadside with a Hex head---that was one charmed, but very scared, squirrel). Hope this helps your decision.