I started with a 658 shield but wanted to go even lower. Plus I did not like the round profile of that screen, it looked kinda ... I don't know... small.
I traced the top edge of the large/stock screen on the 658 one (first masking the whole thing with painters tape) with a Sharpie, then cut it with a hack saw and then wet sanded the edges with a random orbital sander, then wet sandpaper. I removed the inside painters tape and painted it black with satin black spray.
if I cut it any lower the gauges would be visible from the front.
I like it. I use it as my summer screen.