cardboard, popsicle sticks and elmers glue.
i made my own by using cardboard from a cereal box to make ramps I taped against a table a table and used metal clothes hangars to make grind rails the bases of the grind rails are made of cardboard I hot glued the grind rail to the cardboard then taped the bases to the table to make manual pads u can use containers small cardboard boxes books etc.
so...dont buy new things, and dont use things you already have...
That kind limits it.
uuuu whats that
naa i prefered recyceling men