Well I bit the bullet a couple of weeks ago and bought a Min Z 19/52. Overall I pretty happy with it. Just turned over 10 hours. I am a slightly disappointed with cut quality. Clumps w/wet grass which I know is not the best scenario but sometimes weather doesn't cooperate. Also even in dry conditions it misses some random blades of grass but especially on right side. I do need to qualify that I have not sharpened bllades and hope doing so will eliminate this. Here lies my problem. I tried a couple of days ago to take off the blades to sharpen them but could not budge any of them. What's the best way to do this? I thought I would take it back to the dealer and see if he would loosen them or take them off then I could oil them and not over-tighten. Is there a method suggested for locking the blades so you can loosen the bolts with out risking injury? I had a walkbehind previously and just braced with a wrench on top but this is not working so far on the Mini.