Monstamaka new connection system

This a new version of the connection system for the Monstamaka sets. I've printed it with ABS on a replicator 2X. It works pretty well, doesn't need support but a raft is necessary, and can be printed upright or upside down (special thanks to dssguy1 for his comments and ideas that made me reconsider the connection system).
If I have good feedback on this from other 3D printers and material, I will replace the current system on all Monstamaka models (I decided to design a all new system not co