I am repeatedly having problems with a pain that almost becomes
unbearable on the top of my front foot in a 2-straps binding.

Just to throw a different option for you to try. It may not be the bindings
at all but the angle of your foot. Try angling the front foot a couple of
degrees further forward.
I only say this coz I also had a pain in the top of my front foot last
holiday and this was the reason. I had taken the bindings off for transport
and put them back on 1 degree less than normal and just one degree made a
lot of difference to comfort.
Worth giving a go anyway.

--
kitemap
http://ugcc.co.uk