Scale it up is possible,the images schould provide you all the details you need, including the sprue placement.
This pendant is part of a collection, if you have further ideas, would be nice to read from you.These pendants, as well as all the models here, want to give the opportunity to small professionals in the jewllery industry to produce locally, avoid investments in technology that might get hold in time, just by downloading the production files from this amazing platform.
Thakn you