Thanks for the replies guys. Please keep your opinions coming.

Does anyone have comments on:

Is there any advantage having 1/2" tubing going into the Cuplex Di rather than 1/4 due its restrictive nature?

Also would it matter if i connected the pump straight to the Cuplex rather than going through the rad first? I would add the Rad after the T-Line. This would help a lot in trying to route the tubing!
Thanks.