I also have done the freezer removal when I applied HS with AS adheasive...
I think that would work ... providing you didnt glue the entire surface of the chip ...
Crank down your freezer temp (if you can) Put the MB in a into static bag (the one it came in).
(examine your MB and HS first to see where you want to put the screwdriver)
Leave it in the freezer for an hour or so... take it out and unwrap it from bag quikly ...
Take a screwdriver,,, and small piece of 'doubled up / folded' cardboard to put between the MB and screwdriver (so not to damage MB)
,,, and quikly/firmly twist the handle.
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I have done this for VC's and MB's .... around 8 or 9 times now ... all with sucess...
But ,,, I didnt use superglue either ...
Good Luck ....