My first post I thought I would talk about my TAC Ordanance. Good, Bad and everything in between. First impression? Man does this thing sling and accurate arrow! Although a great shooter I quickly noticed a couple issues. Shooting the factory PSE 26.25's I noticed deformation of my vanes after just a few shots through the Whisker Biscuit. I read anything and everything i could on the TAC's which led me to immediately get the drop away rest. This has been the best upgrade to date. Surprized PSE does not offer this as an option. After several more shots, I noticed my lower right vane was getting clipped on something. I initially thought in was hitting the dropaway but after closer examination it showed signs of clipping the top cable on the bottom side. When I took a real close look, I noticed the factory arrows nock index was off slightly on every arrow (Cocked to the right) which could explaing why the lower right vane was getting clipped. After much more research reading forums, I decided to try a 2 vane configuration on my TAC 15 arrows. I used 3" Duravane's which are slightly larger than the Duravane 3D's.I must say so far I am very pleased! I notice no difference and maybe slightly better performance over the four vane factory configuration. This also eliminated the fetching interference with the lower cable and the bottom of the scope rail. For my primary purpose being hunting, the two vane is perfect. Easier to fletch, cheaper! and groups at 3" off bullseye our to 100 yards. Plenty good to bag game! Another issue I ran into is an occasional nock getting destroyed by the sheer force of the cable slinging the arrow. Can really figure this one out. I did notice the nocks on the factor arrows have what appear to be portions ground down I assume to aid assembly? My replacement nocks fit just fine. I tryed the Bulldog collars on PSE TAC arrows but this did not work at all. Nocks get destroyed after just a couple shots. I assume the collars may work on the upgraded arrows offered for the TAC's. Once last issue I had as well as other I've read was the cable jumping while cranking. This is an easy remedy. Pull just enough rope to allow you to hook your sled. If you unwind too much, you will experience the cable jump that can actually launch your arrow about 5 feet. All in all I'm impressed with this crossbow. Downsides are length, weight, and the expense to own and operate this machine. This is not a cheap sport! I've already lost $40 worth of arrows for various reasons I wont go into. Just trying to find a target that can handle this bad boy is not cheap or easy. So, if your on a tight budget, stay away from this one. Would I buy it again? Of course. The accuracy and power this crossbow brings is second to none in my opinion. I picked up a pack of the Aerovane III's and am thinking about trying a 2 vane set up just to see how it flies. I'll update if anything noteworthy.