MCW55 in SLI tubing solution
 

That bend (180 deg) from block to block is tough to get right W/O kinks, coolsleeves, wires, or ties.
Try this: Get about 1 ft of 1/2" CPVC (the beige stuff, the tubing fits over it easier), cap one end, fill it with sand (dry sand!) cap the other end (no need to glue the caps) heat it up over a stove and bend it into a U around something with the proper radius, cut to length, add hose and clamps. The sand keeps the CPVC from kinking. When you bend it, you'll get a nice, even 1/2" ID bend.

Re: MCW55 in SLI tubing solution
 

Wow...this is pretty interesting. If I have trouble when I try to make the bend on my SLI this weekend, I will definitely try this.

Re: MCW55 in SLI tubing solution
 

four copper 45° st ells do the same I believe

Re: MCW55 in SLI tubing solution
 

That is an interesting way of doing it. I've never thought about that before.