These days I'm using Gballs E8 Pro balls at 2.8"(70mm)/135g: https://gballz.com/collections/e8-pro/products/e8-pro-series

They're really cool but there is a lot more volume in them than my old medium Sportcos, despite only being 2mm wider in diameter.

I will have you yet: http://www.libraryofjuggling.com/Tricks/3balltricks/InvertedBox.html

Also nice: http://www.libraryofjuggling.com/Tricks/3balltricks/ZebraFactory.html

Reverse Mills is funky looking

Kraken

Cool 3 ball style: https://www.youtube.com/watch?v=TkMMpBZAJLc

Three ball improv: https://www.youtube.com/watch?v=h7KxJ-JdDko

Mental style: https://www.youtube.com/watch?v=_AFOYBAg69s