pixelprimer
I got mine used and in the bag of shame raffle 😅 AUD to USD makes them pretty expensive. They are really nice though. If you’re on the fence I’d get some printed in MJF and use those for a bit. )Then you’ll fall in love with the profile and be forced to buy the real deal hahaha )
Vertical Combos are pressed with a single finger. Possibly easier depending on keycaps and key spacing (choc spaced and Chicago Steno is what I use). You basically press in the crack between the two keys pressing both at once.
The horizontal combos are done with multiple fingers. You can see the blue keys on the base layer as well as the combo diagrams on the bottom for the rest of the combos.
KeymapDB is great and I believe they have a combo/chording filter to look at keymaps that use them.
I’ve got quite a few combos on my keymap while still typing in a standard way. More combos than keys haha https://keymapdb.com/keymaps/grassfedreeve/
If you’re looking at red pro, I’d go for ambient twilights the new silent switches are improvements in every way for linears.
26-key, column-staggered, wireless, reversable, split keyboard made with Ergogen and KiCad https://github.com/grassfedreeve/pueo/
For a silent and portable keywell you’ve basically only got the Glove80. Their new Cherry Blossom silent switches is where I would go. Voyager is also an option but only slightly less expensive than the glove and you lose the keywell. I’d definitely go for that if you’re willing to drop the cash. There’s usually a few used ones up for sale on the MoErgo discord