No hoseclamps necessary with 1/2" Vinyl tubing over 1/2" copper tubing... or over 1/2" Acrylic tubing. I had to taper the Acrylic tubing to make it easier.
To get the tubes over the copper... I stuck 3/4" of the Vinyl tubing in really hot water (boiling... and just poured less than 15 minutes before) in a bowl for about 1 minute. It really softens up the tubing so you can stretch it. This technique can also be used to mold it into a permenant curve.
When I try and get the Vinyl tubing back off these connections, more often than not, I have to literally PRY them off a bit at a time from either side. They do NOT just pull off.
As to the temps...
According to MotherBoard Monitor 5.3.6.0 with a constant case temp of 25° C
Idle (only minimal background programs and services running): CPU & HDD 38° C
Heavy Load is a different issue...
If I load up the CPU alone... (CPUBurn for example) it never breaks 60° C
If I load up the GPU and CPU... (1280x1024 DX9 game with looping time demo) it has given me an alarm at 70° C
I suspect that's from the smaller and low speed fans. I have two 120mm fans that I was running prior, but they are VERY loud.
The upside to the 120mm fans (that are VERY loud) is that they kept the air coming out of the radiator cool... meaning the water temp was kept low.
Now, however, the air is constantly coming out VERY warm. I suspect it's near 45° C as that's about as high as the Hard Drives get during the heavy loading. I believe the water is the same temp as the Hard Drive cage, but I will have to put a "T" probe in the line to check.
Bottom line... I will post temps again AFTER I get the new fans to let you know for sure.
DISCLAIMER: I do NOT and will NOT approve of you using my tempretures against me. These are actual readings from MY hardware, not yours. If you build the same box, with the same components and the same water cooling system... THEN you can argue MY tempretures.
(But only within a few degrees mind you
)