Summary

Designed these for my Danish Overnighter using the 112mm size half-round guttering.
I brought over the screw hole in my 76mm design to avoid the awkward twisting or angled screw when attaching.
The joiner is a screw free design and works well with sealant applied first.
The end cap, again, works well using sealant like the 151 brand from Poundland.