very much so, Yupar
1 and 6 too - it's the kajira 'whipping' posture
(though my Master makes me stretch my arms out in front,
so the lash can curl round my ribs and kiss my breast)
5 is a good crux position too -
having my ankles shackled by a longish chain through a metal loop
allows me to flex my legs nicely
as I struggle to ease the racking tension in my arms and body.
Interested to hear of your pewter shop, MM, a shame it had to go.
If you know or can guess what 'puta' means in Spanish,
Pewter Puta is a nice punning name for any of these girls!
I see some are on offer on ebay.