An important part of the original IndexSAR hand development program was the design of a detachable low loss ‘air’ spacer and phone positioner, IXBS, that fits, and can be fixed to the palm of hand, this allows the phone to be held in a more realistic manner and, most importantly, be able to be position the handset repeatability. The DUT is fixed to the spacer using 3M ‘Dual Lock’ strip for easy device holding, giving virtually no lateral movement. The spacer has number graduations to permit easy re-positioning. 3D printed with an SLA technique using a low loss material. OTA tests have shown excellent repeatability, within +/- 0.1dB.