The subject of leaking wells on the Q-jet and what to do about it comes up fairly often.
Shown below are both unused and well seasoned main well "plugs"- like are included in most rebuild kits. The idea is the plug will press against the well bottoms and stop the leakage. Maybe in theory, and maybe for a little while, but it is obviously NOT a permanent fix.
A new plug is on the left, the shriveled up plug on the right was just removed from a Q-jet brought in for a rebuild.