Just picked up an ESP4/51 filter for my EM5800 SB, Ive been using an EM430 grinder, first cup thru this new filter was excellent, so made another and excellent again, very happy :-)
Great news Jamie..... 8-)
Keep em coming mate ;)
what setting are you using on the grinder?
Im using 4.5, but I have modded it as per instructions on this web site. So I guess you cant compare to standard setting. The grinder works suprisingly well.