Exaclty what I was looking for. The print itself was trouble free, but the inserts to hold the cable are too tight and I could only get one in, no matter how hard I tried.
Is it possible to get the dimensions of the Esun spool? I've got a pile of Kingroon spools I'd like to use this on, but not entirely sure if it'll fit properly. The ID of the spool for the Kingroon is just a hair under 58mm.