How may I remove the case from a Dell venue 8 7840?

[AC Question]

Hi! I have a Dell Venue 8 7000 series android tablet (it has an aluminum case), with a cracked digitizer. There is a lot of information on the web for other models. The aluminum case is a close tolerance fit, and even a very thin blade will not fit between the case and the digitizer. Any help will be appreciated. Thanks!-Bill