<p>I have break my mind, trying to open this prism.<br> Four crew around the body of prism I have remove, but without success.<br> Bottom cover does not open.<br> Does anybody help me how to open this prism?<br> Problem is - one of contact fall down into the hole and I cannot catch it.<br> So I think if I can open it (prism) I could put it to the right place.</p>