i could donate a model of the mason jar mine. if someone could script a timer for it, that would be really sweet.
i also have an idea to use empty soda bottles instead of the jar. it would save some time with the model, plus if you could make it at a workbench, the bottle could be one of the parts. although from the sketch, it looks to me like regular nails are being used instead of railway spikes.
another idea:
would it be possible to script it so that the mine would only detonate when something passed in front of it (maybe attaching a sensor module for effect)? i'm thinking a claymore-type mine could be made.
tbh, i really don't see the point in the piggy bank grenade. i dunno, if it functioned as a poor man's grenade that you could build at a workbench, using really cheap, readily available parts, that might be cool. other than that i think its too similar to the regular grenade.
ps:
i svck at scripting/texturing, so other people would have to do those.