I hope when you say "final release" you mean "I'm not releasing anymore for now as I've fixed all bugs so far". It would be a shame for such an innovative plugin to disappear like that. Your plugin will be the future of Marathon, I guarantee it!
Note: this plugin appears to work in both M2 & 3.
This plugin will replace all of the standard Infinity weapon items, ammo boxes and powerups with proper 3D equivalents. A demo map featuring all of the new models has been included.