I use the TWH recipe with the moon cake press. I haven't tried any from the files, but it seems like Judy's and Lana's are both popular. I can't share the TWH recipe, but I can tell you it uses a bit more SLSa that the moon cake recipe, but doesn't use any cocamidopropyl bentiane (WSP bubble up). I don't sell, so the cost difference is negligible enough for me.
Royalty Soaps has a good video on making bubble bars using the TWH recipe, and I do it pretty much like that. I have a dedicated bowl and paddle attachment for my stand mixer. I roll the dough into 64-65 gram balls (seems right for 1 bath, and I think 50 grams would actually be enough), and rub just a whisper of baking soda over the top that will be in contact with the press. I also dust the inside of the press with baking soda, and have baking soda on a plate or paper towel that I push the plate into before putting the dough in the press. If the dough is too sticky and gets into the plate, I just change that out. I do sprinkle the top with a bit of glitter, but only a very little - just enough to add a little sparkle. Spritz the top with rubbing alcohol and let dry for a day. Then flip them over and let them dry for another day. It takes a bit of practice to get the 'feel' of the dough, but it isn't hard. If it was, I'd have given up. I'm pretty sure I would make a mess of the jelly roll style. I also prefer mine to be more pastel in color, so I just use a little mica to color them.
It seems that shower steamers are also popular. I haven't tried them yet.