No problem, I spoke with ASUS and the DSL-AC51U does not support 35b Profile but was told that it should synch OK via VDSL 17a for your speeds and work just fine. Looks like a weekly reboot is the only way around this
Still got 8 MB free RAM now after 4 days runtime, so I am definitely moving in the right direction….
BTW thanks for the above update 
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