[Masteryota]

I would either cut the square 'axle' off and me it forward and reattach it to the main frame tubes, or add another brace between the frame tubes. This will help keep things inline, then add your axle brackets where it originally was. If you were to remove it completely, you would have little support to keep things square. Some braces and gussets properly placed and you should be golden. Once you get the axle in, then you can start eyeballing where to mount the brake caliper.