"This was exactly what I needed as the fixed 90 degree angles were too bulk to fit into the tight space.
The idea is brilliant, but I was shocked how bad the fitting was! You should expect some minor gaps when putting together ducting. Normally the solvent cement fills these minor gap in. This fitting does not give a snug fit and leaves massive gaps!
I had to use half a bottle of the solvent to make up for this as I had no other alternative."