HM Kafer cup Brace

[Martice]

Hi guys,

I would like to find out, with your help, if a Kaefer Cup Brace can be made from scrach, and how to.
At fist site seems not to be a hard task, but I would like to hear the opinion of someone who've seen this brace and knows more about it befor I start testing my ideas.
At first, how does it work?is there anything special about its design and materials used?
Why is so expensive?($300 )


I am looking forward for your opinions on this!

Take care,

Martin