Should I even bother trying to fix

I have an NH 310 that seen plenty of hay.  I bought it on the cheap and knew this day would come. While doing some May hay quick I ran into a failure on the plunger.  The back portion of the plunger including the last six inches of plunger that creates a channel around the left hand needle broke off the plunger (but did not break the needle!!!.)  I am considering removing the plunger and repairing if I make this my back up baler potential. I am thinking about removing the bearing and pin that drives the spring loaded feed fingers and pulling the plunger back to investigate the repair.

 

The question is should I just offer the belt thrower for sale, then keep the needles and knotter, tines, etc (for use on an NH 268 which I am buying) and scrape the rest.  The chamber is pitted enough to get me thinking I should go this route.  Also it seems no one really loves welded plungers.  This would be the second time welding on this plunger... I know now that I have it apart.

 

So the questions are:

 

1. Would you try to weld the plunger again?

2. Would you keep parts off the machine?

3. Would anyone want to buy the thrower or parts making it worth my time to dismantle?

4. Would it even make a good back up baler with it's history?

Should I even bother trying to fix