Phil Pascoe
Established Member
If you can get hold of an odd spare carpet tile and offcuts of 18mm ply, glue the tile (cut up first if you've not a bandsaw) to the ply--pva will do. When dry, cut into pieces about 5" x 3 1/2" to make free sanding blocks. I've cut them on a bandsaw without messing up a blade. There is just enough give in the carpet for them to be effective, and they last forever--I'm still using some made 20 years ago.