BUTT•N GEAR! Get your Butt•n gear! Thanks for the great design +Jeff Parish https://www.thingiverse.com/thing:1117591
Love them, will get some printed myself… 
Nice job!
What you show printed is actually the 2016 version with the shoe lace strap holes.
There is also a 2015 version of the slots as well.
Post you make!
Very marvellous
Good work