Thanks, I hope it helps someone. I am looking into finding some 7075 to replace the 6061 turnbuckle tube that I have above. I am also looking into front and rear endlinks.
You can also trade the AHT12-15.00 for a AHT12-14.00 and cut 0.5" less on each end and be able to get the full 15.5 to 16.5" adjustment. I used the 15 since it left less unused threads since they are tapped 2.5" deep on both sides.
Also I found out that the STi links are longer then the RS links I believe 405mm (not proven but close to the 16" measurement I have) compared to 415mm (proven) so if you are making them for an STi you would want to cut only 1.14321" from each end to make the factory length at the center of the adjustment. This will make your adjustment from 15.83-16.83".