Challenge Coin / Collectable Coin Holder for pinboards

We do a lot of escape rooms, and many give you timecards at the end.  Some give out other trinkets, keyrings, pin badges, and some coins.

We collect all our “bits” on big corkboard panels on the wall, so I needed to make something that would hold a coin.  

However we want to show off the coin, not the PLA, so this is designed to hide as much of the print as possible, with cut-outs to reduce print time, material and weight.  The drawing pin hold is slightly countersunk so it not proud of the rest of the print.

For Reference the coin in the images is about 4 ½cm diameter.
 

WARNING the arms that hold the coins are delicate and of course need supports.   I found that to get the support out without breaking the arms, I needed to use TREE supports and tell your software to build the support form the base, NOT on the base (which will be the backplate once put on the wall) 

That means once I popped the print off the bed I could bend the support back and forth, whereas if you have the tree from the bottom of the model you need to try and cut them with a blade of sorts that tended to put too much pressure on the arms and snapped them.  

See the last image for a better idea, its not a great shot but you can see how the trees are not connected ot the model, so easier to flex and remove.