[sil8ty]

Yep I think there will be less water in the warmer weather.

There's definitely little to none during warmer periods. I read some people are having a hard time opening their caps, I recommend using a ball valve, can't remember the exact name,
but Here's a picture of it, Mishimoto sells them too, f or too much. Install a barb, run and hose from it to the valve / ball **** near where you drain oil and have easy access

 

[sil8ty]

here's my dual can can solution. Made the support my self using 3 factory mounting points

Not even visible, concealed.

Peek a boo

 

[sil8ty]

You connect the hardware to where the bottom plug in the OCC is located as he stated, running the hose down by your oil pan and locate the ball valve there. Open the ball valve and drain the OCC during an oil change.

BINGO!

 

[sil8ty]

In theory it would work, but there's not much room for the hose to run towards the bottom of the engine without touching something hot or melting the hose on the turbo etc.

you can easily running along the side of the rad, just tucked in red marked area, just tie them down to the side with wire ties or a adhesive cable clip mount ->

The green circled area, is another way straight down, just harder to place the valve at the end since you have to come back into engine bay. There is a drain hole there if you want to direct that as the catch can drain end.

 

[sil8ty]

The VR30DDTT engine setup catch cans mount on the left side of the engine bay towards the rear:
View attachment 91015

you can still run drain hose to the front, you'll just have to run long and sloped. Since you're running the lines upward, have you checked if there's water the lowest part of the line and traps at the lowest point. My lines are all sloped downwards to my catch cans

 

[sil8ty]

Cheap and they're air tight, same thing Mishimoto uses without the $$$