I came here to report same issue with basic loaders.
I have both vanilla loaders hd and loder redux installed. All of the other loaders's snap logic works great but basic loaders need manual rotation and placement. 
Loader Redux has a method call to attach snapping logic to loaders. 
This problem can be solved if you can call this method if loader redux is also installed with your mod. 
remote.call("loader-redux", "add_loader", "basic-loader")