I've been using Shmupmame to run tgmj and tgm2p. tgm2p seems slightly more responsive in regards to inputs, but I just figured this was due to it being a later release. Recently, I read here (https://tetris.wiki/Modded_MAME) in the notes that "It maked [sic] tgmj less playable due to the introduced processing overhead, but tgm2 and tgm2p are fine". Is there something more optimal to run tgmj on, besides an authentic board? My apologies if this question has been answered before and is redundant, I couldn't find anything about this.