Use a higher % fill to get better density. Going to 100% fill means you can make a 54mm-ish yoyo that’s in the right weight range. If you want to get something with a very specific weight distribution, you can also model the empty space yourself and then print in 100% fill, like Fluid Print Dynamics did here: https://scontent-sjc2-1.xx.fbcdn.net/hphotos-xpf1/v/t1.0-9/10959663_333592566829523_407347054563731523_n.jpg?oh=e1457fb1a5d1f7c4ec193d2621bf6436&oe=57BFDDC7
