There were three generations of RP5O14 mounts. I will separate the three to allow all available documents to be posted.
#1. China crystals mounted by Astimex Scientific and sold up to 2010 by SPI Supplies as AS-02758 (see attached China references). All references identify these as monoclinic and they were only sold mounted.
The distinguishing feature is that the wells were 1.2mm not 2mm.
A custom orbital polishing machine was used after mounts were trimmed flat with a diamond saw. Photos of all grains were made starting in 2006, using reflected [polarized light that made all grain boundaries and twin contacts visible. John Rucklidge had a firm policy to consider all claims of defective materials and these were replaced free of charge until he gave up ownership of the company at the end of 2012. I never heard of any defect (other than "wrong element") being reported for this product stream.