Ball-Head Toilet

[VicS]

"I didn't realise that the base unit was only plastic so I think I will also be removing said beast in the not too distant future. Vic, will you be glassing both sides of the hole to seal it off or using it for some other purpose?"
I once had a Leisure 17 and someone gave me a Ballhed toilet for it - I never fitted it, I just didn't like the idea of cutting a 4" dia hole in the hull.

Yes I did that. Chamfered around the hole on the outside at the recommended 1:12 angle ( makes a big area to patch when you start with a relatively small hole about 2.5 " diameter IIRC) and patched it with biaxial glass cloth and epoxy resin ( appropriately thickened and pigmented)