Hi w_keen, yes a red filter will definitely provide some contrasty shots. For my tastes it can almost be too much under most conditions. It can be easy to loose some detail in the highlights and shadows. Lately I find myself preferring to go with a yellow or green filter which gives more contrast but, keeps all the detail. For printing grades, grade 2 is normal grade, while grade 5 is the highest contrast. I'd love to see some of your old prints if you'd ever like to share