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Looks good for the most part in my opinion. I was wondering if you could heat up the heat shrink a little more though. It looks loose, but maybe its just the picture.
Is there any way you can retuern that heatercore? Its going to be a PITA to get a 1/2" fitting on there. That tubing looks strong but not very bendable. I would suggest some clearflex60.
Anyaway, if you must use that heatercore you will have to get a welding gun and melt the solder around...
I'll take your post one question at a time.
- Yes, I think watercooling is definitly worth the $200+ because it is far better than air cooling, and its fun!
- Yes, if you want to overclock, and you aren't ready for the complexity of phase change cooling, which can cost big $$$, than water...