just to let people know that Apron Rules Card Holders are now released on Shapeways in various colours
apron card back (resized).jpg
Apron Card Holder 2 (resized).jpg
Apron Card holder 1 (resized).jpg
These were designed due to a request by a fellow pinsider and were designed specifically for Stern Steel Aprons (Sterns and PinballLife's) with the rule cards. The standard sized card slides into the thin gap and the holder simply drops into the steel apron slots (and you could add some double sided tape to lock into place so to avoid dropping out when tilting the playfield) and removes that ugly card bend and gives the apron a nice clean flat but 3d dimension look.
These are available at Shapeways, and apologies about Shapeways price which is due to the size and space it takes up in there machines, but they do look cool and give the games a clean look available in lots of colours.