[krp]

That 1/2-inch braided tubing is probably stiff and springy enough to lever the waterblock off the core and rock it whenever you need to move the tubing... but do you really need the braid?? - that's mainly for reinforcing tubing under higher pressure like carbonated beverage tank hookups etc.

With anything less than an insane pump, you would be unlikely to develop more than 10-15 psi with watercooling, (higher pressures would only serve to make the pump work harder and heat the water more.)

Suggest using something much softer and more flexible, durometer Shore-A 55 or less, like:

McMaster 5554K18 Tygon PVC 1/2inch ID
or
McMaster 51135K41 Silicon 1/2inch ID

The Tygon PVC is clear, the silicon is translucent, either would do the job though.
McMaster's "laboratory grade" is usually the softer, more flexible tubing selections.