Maybe make 3 of those blocks ...
Yeah why not
A bigger rad is not a option, the challenge is to fit it all in the box
That also seems like a very good block, but it looks same same, and yours is very hard to come by here in this potatoland
So i'll just have to go with that Titan.
The double loop isn't to complicate, it's to simplify
This way it's doable with the tubing, otherwise i'll have to use 90° cornerpieces and that i want to avoid ...