attempting to push or pull an active quarry results in a catastrophic crash of the client/server.

Can you upload the crash report (of the server if it's running on a server, or the client if it's a singleplayer world)?

issue resolved. It was caused by another mod that enabled pistons to act on blocks they shouldn't interact with.

My apologies

I'm still interested in the crash though, as there might be something we can do to prevent if from crashing? (Although this really depends on what the other mod does to pistons).