I am connecting 3 linear v-slot 40x40 rails together with a maker link. The rails will be connected inline. I need to make the areas where the linear rails connect together much stronger. With just the makerlink connector 8 can bend the rails on either side of the connector and break the connector. How do I make the connection stronger. There or 4 cylindrical holes in the rail. Can some rods to go in those holes and make the connection stronger? Where can I get the rods from? Thanks.