Nice work DW! There are some very interesting exercises to be had with the KB for sure; getting up from a TGU with that weight overhead is intriguing the first time it's tried and the BUCP along with the BUTGU is frankly frightening at times, but fun
Have you tried the Waiter Press at all? I'm only at 8kg with that particular exercise, I may get to 12kg one day
but there's a lot of balance involved and it's such a strict press both of which make it feel 10x heavier than it really is.