So um for the case , um we told we were making a specifica specific assumption that it would be curved in design.
Course , you know , I wanted it to be expandable and shrinkable , but um that uh doesn't seem to b be one of the choic non-option we can uh  we can really seriously explore ,
so then we were thinking about um rubber , but um unfortunately that's been eliminated because of the heat uh factor
and th um there might be some  problems with the m uh how it's   uh goes with the board.  Uh and uh then th plastic also has this problem of melting and it's brittle  it gets brittle after a while ,