Print any riser/wedge you'll ever need for your skateboard or longboard.
Oldschool and newschool bolt pattern (or both).

Public domain. 3D printing is not a crime!

Requires the OpenSCAD MCAD library for the bolt sizes.

Parameters:

/* length, width of wedge height of side 1 and 2 drill oldschool and/or newschool pattern bolt size (M) NOTE: if both oldschool and newschool bits are set to 1, the newschool pattern will be displaced to match on one side.*/

You might want to set the infill to solid if you expect to grind your gear and weight does not matter.

Print and skate.