The clearance is perfect (I think) on the castle and the clearance test part using the Prusa printer, Prusa Slicer (with the settings Angus suggests) with only a small issue with the bridge arch.
The filament was PolyMaker's PolyTerra laba red with the appropriate profile loaded into Prusa Slicer.
I want to test more filaments as I've got a bit of a broad range on hand and I find with the exact same settings the results are very different (including needing to adjust the Z axis to get good bed adhesion), so if I find the time, I'll post a follow up to this video.
The clearance castle is at https://www.makersmuse.com/clearance-...