I have a Rancilio Silvia and a Breville Conical Burr Grinder. We roast our own beans using a Behmor 1600, and typically do kinda light roasts. Very often, regardless of the bean, roast, packing pressure, or grind size (as far as I can tell), our bottomless filter sprays coffee all over the place. Occasionally, it works fine, but the vast majority of the time it sprays at angles that I thought were impossible (i.e. approaching 90˚ to vertical). Has anyone had this experience and do you have any suggestions for fixing it (or even troubleshooting it)?