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ElliotPSA already slabs T3's in a holder the same as their regular holder, just much bigger.  I think they charge $35 for this service, and I imagine that they would also slab similiar sized items to T3's.  IMO, a much nicer holder than what GAI uses.  One could only hope that SGC comes out with a similiar larger holder, as with the gasket a number of items that are too big for the regular holder, but smaller than T3's can be slabbed, and still look good.