The standard hyper is card spool usually, not an issue, just make sure you don’t damage the edges.
This is similar to what id seen online. I may end up printing some spool rings to sit round them - and to use up the w@nk filament we have left over.
Oh, and to protectb bed sheet coating, use so print spray. My preferred is3dlac but glue sticks, hairspray, whatever. Suspect you use something on ender anyway
Honestly I never have. Rightly or wrongly I'd always seen warping / poor bed adhesion to be a sign I needed to dial in my settings better (gluesticks being a common crutch in this scenario from what I've seen) and my ender came with a magnetic flexi bed sheet which I'd considered to be a semi-consumable that I would replace as and when, given they are <£10. Never needed to though - it looks a bit tired now, but still fully functional after 2 yrs.
That said, the K2 is going to print an order of magnitude faster than the ender, so additional stick would probably come in handy. Looking at the 3DLAC - do you need to spray the bed every time, or is it a bit like rainex where a coating is formed that you topup periodically? Also, can you spray it on and leave it? With cloud access I can see me printing from remote locations (think the office when I should be working, but I'm not), so having the printer ready to go would be a plus.