After months of planning, the scratcher finally got updated.  It's now waterproof.  The head doesn't require farsteners. This entailed printing the handle in 2 parts.  

The most needful part of this is a thumb slideable cover, allowing it to be used in bed without getting up.  The head should be covered up to avoid tearing up sheets.

The problem is the cover flops around when it's not in use.  It has to be held out of the way.