The condenser is 700mm long 15mm from Bunnings. The tees are 15×15×25 also from Bunnings. I was going to use some sort of tap fittings to connect the hoses but decided against it mainly to keep the weight down. The lower (water intake) is 6mm s/s pipe that we use for instrument airline. The top was 10mm (9.5mm OD I think) which fits the existing T500 hose well.
I couldn't find any reducers for smaller than 1/2 inch(12mm) so I reduced from 15-10mm by packing the joint with a couple of wraps of copper wire. This stops the solder just falling through the gap and makes a solid joint. On the water intake I reduced from 10mm to 6mm doing the same. I took a couple of photos and was going to post this process in the tips and tricks section. Hope this helps