I use the shorter upper spring arm on my TD B riser. There is a right/left configuration but the lower bracket with the screw slot. can fit either side. When I say "short" spring arm, that's for the TD and converta quivers. The shortest arm that was available for the double spring systems is too short though they will work on a Super K. The short arm puts the attachment very close to the hood and produces considerably less vibration than the longer arm. Grant