Correct fitment for my power rake "tines" takes longer than I expected, stripping down and changing three at a time and putting it all back together took 60min + But if I done it again I would be quicker. Allow yourself 60mins to do this. I had previously used it the week before and done a quick test after reassembly. It was removing lots left behind from it's "toothless" attempt. Theres a ready done straight drum replacement for some models approx £6 more, couldn't find that for my model. But worth considering. It'll save you time. Took me around 1Min+ per 3 I changed. (20 rows of 3)