grammargran
That’s really interesting charleygirl. My scar’s around 6” long (although I’m rubbish at guessing length, distance, etc) and smack in the middle of my side. I now have a vision of all us hipsters trying frantically not to twist ourselves too much to measure scars and note position of same!
I stood on a low stool in the bathroom and looked at my scar in the big mirror over the wash basin. No twisting involved 
I think we need pictures to see just where the scars 'should be'... I think mine is indeterminate.
So, which 'insertion' is more vulnerable to early side lying?
Or, to rephrase, which one indicates that you absolutely must sleep on your back for the first 6 weeks?
Oh dear, Charleygirl, a leaking hwb, what a nightmare. Will you be able to get the mattress dry?