I'm in the process of trying to get the display off to upgrade to SSD (iMac late 2013 27"). I have the tools and I just sliced the adhesive around the display with the cutter. I'm able to lift the display using a suction cup by a few mm, but it's still not coming off easily (esp. on the sides) and I'm wary of cracking the display if I apply too much force. The tools came with only 1 suction cup. Any advice?