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Default Any hints/tips for removing a 5x5 ball grid array chip?

Removed in good order for re-use that is . No specialised tools available
and I'm not going out to buy any for a once in a year job. I have a few
ideas but have never had to do it in earnest before. There is about 0.05 mm
clearance space between the balls under the chip and about 5 x 5mm in size.
A few minor SM can be removed from the opposite face of the board,
multilayer and about 1mm thick


 
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