MATERIALS...1/ A Float (either for toilet cistern or water tank) 2/ A bolt ( i used an old one i found laying around). 3/ A cork 4/ A wood dowl 5/ 2 drill bits (20mm flat wood and the other just a bit smaller in diameter than the dowl) 6/ some ceramic baking beads.
Step 1: Cut head
Step 2: Insert bolt
Step 3: Drill Float
Step 4: Insert
Put the dowl in the smaller of the two holes and put the ceramic beads in the larger hole ( i use about 20-30) . Put what ever your milling in and push cork in.............