For roughly the same cost of a converter, I'd rather pick up another TG-16 and region mod it (leaving your current TG-16 unmolested); either that or get a Duo-R, which are quite a bit cheaper than US Duos. Alternatively, you could pick up an Arcade Card Pro and fit it with a ChopsadoTM, which would be the most economical route to playing Super CD-ROM2s with the added bonus of being able to play Arcade CD-ROM2s.