No reason to extend the tongue. You want the coupler right at the end of the V where the 2 drawbars come together. That's how you get your strength. If you look at a trailer web site, you will see two types: one is a light duty trailer with a single drawbar coming out from the frame. They have very low weight ratings. The second kind is what you have, with a double V drawbar. The triangulation makes it much sturdier. When your previous owner stuck that silly tongue on there, he negated the strength of the V. Cut it off and weld a channel on like the pictures show and you will be good to go. The only thing you will sacrifice is a bit of turning radius, but not enough to worry about.