Questions on Item #1.
Do you open and close the new valve based on need for heat? Are you removing monovalve or just unplugging electrical connection? Does the thermostat still regulate temperature?

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Joe Myers

'83 300D (light blue)
'82 300TD (off white - parked)
'87 300SDL (silver)

'75 300D (black - sold)
'76 300D (beige - totaled by pizza delivery car)
'82 300D (metalic blue) sold