Personally haven’t seen an automatic tool changer for LowRider 2 or 3, but am relatively new here. Would be cool. Personally I’d first consider adding another Core before going down the deep treacherous rabbit hole of designing and building an ATC. Especially since I can’t even get Z probe to work, LOL.
@jamiek designed, coded, implemented and documented his IDEX dual carriage mod for LR3. Really cool innovative approachable project that I’d be more likely to try out (using Jamie’s documentation and code changes) than explore a full ATC.