The original model here looks great, but I found a couple of issues - firstly it was difficult to print - no orientation worked without support and it didn't bridge well, and secondly the disc didn't actually fit (it was an exact cutout, which anyone knows is not realistic

I adjusted to give a small amount of clearance - it is now firm but fits and just about removable (I swap heights for my kids)
And laid it vertically chopping off the bottom to print without supports