Note- We advise you to wear glasses/goggles during the back-lapping process as the paste can spit off the cylinder at times. It is also a good idea to have the cylinder at a comfortable height while you're doing this and please be careful as the blade will be sharp.
If your blade is stone damaged it is still worth giving back lapping a try- if you don't have any luck doing this you can take your cylinder to your local Allett Dealer who will do this for you using a grinder. We advise you to always take your cylinder to an Allett dealer to have it sharpened- back-lapping is meant as a temporary sharpen e.g. during a busy tournament where grounds teams don't have the time to visit dealers etc.
24mm socket for Kensington, liberty 43 and Classic petrol
The 1 and 1/8 socket *28mm) will be needed for the
CLASSIC 12E
SANDRINGHAM 14E
LIBERTY 30 and 35
We also say in the video that you need a drill with a reverse direction. That isn’t correct. The drill just needs to turn the cylinder clockwise from the cylinder drive end, which is the conventional direction for a drill.
https://www.pitchcare.com/shop/mower-maintenance/back-lapping-paste-80-120-grits.html