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The promotees here, numbering over 100, are particularly under-utilized elsewhere. CV Prolificists wanting to enlarge portfolios, we may not have stressed enough that here are over 250 piece-types, ready-made and well-defined, many never before used in other than large and very large Shogis, as Taikyoku Shogi. Why not incorporate these within 8x8, 8x10, 10x10 pairwise taking mixes of specific quartets, quintets, to balance the sides, both across and along, of starting arrays symmetrically. Many tens of thousands of new games would easily become available. Like Frank Truelove's piece list of several thousand pieces, those defined in Prichard's 'ECV' 1994 and Dickens' 'Guide to Fairy Chess' 1967, this article too by Umebayashi and Smith should become standard fare for your building blocks -- way beyond the Betza atoms five.