When you have 30 coppers left, press F1 and press 4. (This will higlight the 30 copper moutain/hill) place the moutain/hill somewhere then you would have -320 coppers. Save your track and load it again. You would have 0 coppers. Press F1 and then 1 to highlight the 0 copper ground. Use that to clear the moutain.(Replace the moutain with ground.) You will now have 320 or more coppers. Repeat this every time when you have 30 coppers to get unlimted coppers!