Dear Gerry, I ought to have said that your approach viz sleeping postures is entirely fitting and valuable. Your idea about inadvertant postural complicity in the natural inclination spines have where already present irritations and protective behaviours , may become worse with even vague extra loads . I do actualy agree with you. That point may have escaped proper spelling out as it were in my post earlier. I see no reason why your ideas and methods could and should not be further explored, for your own as well as the potential for benefit broadly.
The point I attempted clumsily was that movement trumps rest everytime as the means to 'unlock' protective spinal behaviour leading to pain etc. By unlock here I mean to resolve and eliminate both the behaviour and the symptoms with long term effect.
Happy Ioster, good egg hunting and hope you get amongst the fertility rituals wherever you may over the coming festive period.
Cheers