Well that's a crap-tonne of waste for a single print! I hope you were *really* happy with those DJI letters 
The model was still in the printer's memory, so I did it just to prove a point, and then promptly put the model with the waste in the big plastic bin on wheels

Once I'm home this evening I will get on and order the K2, not the pro or plus versions as they are getting on for double the price and not something I can justify at this point. Or rather, I'd rather have the K2 and a little mid tier resin printer for the same money
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Don't let me talk you out of the Bambu - the cloud thing turned me off at the time, so went Creality instead. I would talk you out of the K1, as doesn't make sense to buy the older one.
Creality UK have a K2 Plus with a single CFS on ebay for under a grand today, open box never used. In my experience of Creality, it will be in a sealed box.
Out of interest did you design your own riser and/or sh!t bin for yours? I've had a look online and most everything K2 relates seems to be for the plus, with some for the pro and little for the straight K2.
I rather like this one, but being tighter than a duck's ar$e I don't like the idea of paying for the design. https://www.crealitycloud.com/model-detail/d3p-riser-for-k2?source=5
My riser came off Printables from memory. I had looked at that one you linked to - well, the Plus version - but refused point blank to "pay" for it. Additionally, it might make the CFS difficult to access properly, unless you are taller than tunnie. Granted the standard K2 might be lower than K2 Plus. Lemme grab a photo of my setup, as I really struggle to get the desiccant trays in and out of my top CFS.
My shit bin is my own design, as strangely I need mine on the back but to nature of room layout, and all the ones I could find for rear were rubbish - either needing magnets, or too small or blocking the fans/vents.
Oh, and CFS needs reels to be a set size - read specs. And ideally plastic spools, although it can work with cardboard, as long as the edges are good.
I can imagine that I will need to work my way through the various toss filaments swmbo and the lad have selected (based solely on appearance nvm the lousy chinesium branding and poor print performance!) before I can get to using the cfs
The Creality printers with CFS attached is a pain to use side spool, as you have to disconnect the tubing going to printer. You sorta can use a spare inlet in the 4 in 1 buffer, but you need to remember to remove the filament afterwards. For common small spools, like SUNLU, people have made spool adapters to use with CFS.