Manually resize Raspbian to 3gb partition prior to building Moode

[Morias]

When Moode was built by hand without Mosbuild there were some handy instructions to resize the Raspbian partition to 3gb which made it a nice size to backup the final image created.

The new Mosbuild method appears to require resizing the microsd to its full capacity when building unless building Moode on a separate microsd.

My question is, is there an easy way to resize the Moode partition to 3gb when using the direct build method?  I tried using Gparted but it breaks Raspbian.