Coin Trap Inside Another One

There are lots of coin traps on Thingiverse, but I haven't seen any designs that embed one trap inside another. Here's how to do it (assuming your 3D printer is capable of pausing a print in progress, which not all of them are):
1. Begin the print (I used no raft, no support, although you can add one or both if you must).
2. When the smaller coin trap is about two-thirds printed, pause the printer and drop a coin into the center. A Canadian or American 10-cent piece fits very nicely. Be sure t