Ducting Adapters - various parameters

I'm building my own spray booth/solvent exaction cabinet using an inline bilge blower as the ventilation force. To complete the ducting system I needed a variety of adapter, reducers etc.
So here they are.
Let me know if you find them of any use.
I printed these in my prototype mode: 0.3mm layer height, 0.4mm line width with 20% cubic infill. They print reasonably fast, come out looking clean and pretty strong.