Late replying, but I have been bust @ work......
For the record, I have ordered a set of brass wood screws to try first, and a set of brass metric machine screws and inserts.
First, I will try the wood screws, and at a later date, if there is room in the cabinet, the inserts (I want to try this as I am considering Bybees, and Quicksilver Gold contact treatment on spade connectors to all drivers, and do not want to damage the cabinets with excessive removal and install of the drivers.)
I'll have to try for myself. I will post my findings, but it will take a while. We are renovating, and will not have system back together for some time.
For the record, I have receiver four private emails from members who do not want to post on the thread, all claiming to have tried the brass screws, and all claim positive effects.