Hi,
I have been wanting to replace my fly screens for a while now and have finally managed to make my new screens including new frames and screen. I would like to now attach the new frames to my aluminum windows but don't know the best way to do it.
Here is what my windows look like without the screens up:

As you can see the windows are double-hung windows so I think I am best to fit the whole window (top and bottom).
This is what the screens look like on another window (which I also want to replace):

These frames are held on with one or two swivel clips.
Is there a better way to attach my new frames to my windows without having to drill holes into the aluminium window frames? Any advice of this project would be much appreciated.
I don't need help in making the screens, just attaching the new frames to the windows.
Thanks