The stainless tube solution effectively addresses the corrosion issue and is therefore a reasonable option.
It fails to address the problem with radiant heat at other times of year when one seeks a cooler cabin. Certainly, cut off valves help; yet convection eventually warms the tubes on longer drives. To address this, I would recommend one consider runing the heater lines from the coolant tubes in front of the cabin through the console into the heater. It strikes ma as no more work that replacing the existing tubes, yet has the advantage of less radiant heat. Actually there are other advantages as well, but, I digress.
How to is at http://www.spacecitypanteras.c...Cooling-JTaphorn.pdf
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