My 21 proline is a few years old and if your like me I have a bungee holding the front wheel adjustments together. If you use another bungee you can open the chute more to catch more grass. Put one end of the bungee around the small steel rod that supports the end of the bag, then bring the bungee around the big black handle on the mower that locks the bag to the mower, pull tight so the handle keeps the chute as open as it can, then bring the bungee back to the rod that supports the end of the bag. I found that when I started doing this last week I can hold about a quarter up to a third more grass. Yes my mower is on its last leg.