If I go foe the DT dropper I’d need to use a shim but that would probably be fine.
You say for fun, but then all your comments suggest you’re just trying to make it lighter. Lighter by even 500g (which would be quite a big saving) isn’t really going to make it more fun.
500g would make a big difference for me going up hill. So, would be more fun for xc rides. I love going fast on this bike. Even though I don’t race, I get competitive with my times. I have a trail bike that’s 3kg heavier which is more fun on rough terrain or decents. But much slower on xc rides. So much so, that I’m planning on making that a little lighter until I find a replacement bike in stock.