SONY Nex-7 shutter curtain unit replacement

My old sony nex-7 has been broken for a long time so I kinda neglected it. But I needed it for my YouTube filming so finally I found repair parts on eBay. タダで手に入れたNEX-7が長らく壊れていたので自分でリペアに挑戦しました。補修部品はeBayで7000円ほど。