We at Firenock has done quite a few upgrades for the PSE Tac crossbow. * We are now offering the 3rd round of upgrade.* First we start with full titanium fasteners upgrade kit which reduced the weight up to 6 oz off the bow. * We then make the aerorest for Tac which significant minimize the wear and accuracy issue with the OEM standard rest as you use it more often.* Now we added the titanium bus cable support/string stop bar upgrade, to what we call the level 3.* For those who love the PSE Tac but was not thrill about how the 2 cables rub against each other, slow down your bow, and may cause premature string wear; Firenock now offer this upgrade kit to replace the original 2 large aluminum cable/bumper with custom design GR5 titanium bars, Limb saver string stops, and 2 nylon cable rollers.* This system minimize the cable wear, friction, and is lighter weight than what the factory offers.* This is only available if you call or email into our office as we only make a few sets due to not knowing the demand for this upgrade, so supply is very limited.* The kit price is $119.95 which include the 2 titanium bars, 2 nylon rollers, and 2 limb saver string stops.* This system will work on 3 or four vane configurations; and is design to clear Aerovane II even with Tac 15 elite or ordnance.* It will also work on Tac 15 and 15i.* Due to reduce in friction, and vibration, up to a 5fps gain has been observed.