To make it more firm, more grip, I take two pieces of metal forming a cross (x) and drill holes on four ends and one in the middle. This adapter can also be shape to our convenient typing position such as top part of the keyboard (function keys) is higher than the bottom (space bar).



The middle hole is bolted to the swivel wheel and now I have four points to hold a piece of wood where the keyboard will lay.



I use any wood I can find and it is rough with the length of my keyboard and the swivel wheel side by side. For home desk you can look for a better piece of wood. Wider is good for your palm rest, but not too wide because we want to hide it under the desk aren't we? Find good piece of wood, but not too heavy.



Now drill four holes on the wood according to the adapter holes.