Some of the design modifications I have seen here on HHP have been really interesting, However the majority of amateur "designers" have little concept of the amount of stress a shoe is under when it is carrying the entire weight of a person!
sure the rather tasteful screw heads, may cause blisters or even blood, but given this sort of footwears not for every days use you might "just" get away with this!
the BIGGEST worry to me for these is those "Nice" heel blocks you've crafted!
those lovely load bearing screws will prove fruitless, as the heel block is raked two far under the foots heel seat & is so thin at the bottom, that its only a matter of time before the heel block WILL snap, along the wood grain, right where that lower screw is. the design & materials you have used make these shoes DANGEROUS!
Given that you are now considering selling said shoes on fleebay, I would question whether your liability insurance is in place!
Its great to see members changing the look of shoes, but please leave changing the design (heel blocks, wedges etc) to the experts, or your going to end up with a nice cast as a shoe!
Lee