Scratches in tilt out window

I'm installing Series 900 spiral balance in a tilt out window and following instructions on your YouTube "how-to" video. Once the new spiral balances are installed and the window lowered, the window will not go back up.

I have de-installed the window and found minute scratches in the metal window guide that are stopping the pivot shoes. I dressed the scratches, tested the pivot shoe movement and repeated the spiral balance installation process and once again new scratches appeared and the window would not go back up. I dressed the new scratches and tested the pivot shoe movement and installed the window WITHOUT attaching the spiral balances and ran the window up and down without creating new scratches.

Could these scratches be caused by the spiral balance where it fits into the pivot shoe?

Two additional issues:

1) The scratches that are inhibiting the normal vertical movement of the pivot guides are coming from the pivot shoe locks that engage when the window is rotated from vertical (normal operation) to horizontal (installation and removal). Any movement of a "locked" pivot shoe seems to be scraping the metal guide enough to create sharp indentations. Since you have to slide one of the shoes in order to remove or reinstall a window, I'm not sure how this problem can be avoided.

2) The reason why the window works fine without the spiral balances installed is because the spiral balance tension is engaging the pivot shoe lock even when the window is rotated to its normal vertical position.

Let me guess....... I need new pivot shoes???