Wrote this instructable hoping it helps others out. I recently needed to socket 2x WPC and 2x sys11 machines. I do not have any fancy desoldering equipment, but found this technique pretty 'safe', and I was pretty happy with how easily the ram came out, without damage to the board.
https://www.instructables.com/Williams-WPC-Sys11-Pinball-RAM-Extraction-and-Sock/
20210826_102757 (resized).jpg
Quoted from koji:Wrote this instructable
Why not post it here? You're here, your audience is here. 
Quoted from YeOldPinPlayer:Why not post it here? You're here, your audience is here.
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Yeah. Afterthought. Format is a bit better for this on instructables.
Also good to advertise pinball more elsewhere sometimes.
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Surrey, BC