Disappointing - Real Avid AR15 Master Bench Block

I bought this bench block for it's versatility and features. Unfortunately it has not lived up to the advertising. The first two operations I attempted to perform were not possible . The bolt extractor screw is not long enough to compress the extractor for roll pin removal. The vertical lower receiver feature would not accommodate any of the lowers I tried. The left side of the block forward pivot area prevented insertion of the lower and locking with the forward pivot pin. The side lower receiver side bed did work.