I'd give it a whirl - I'm betting it yields better results.

If you already know this then ignore it ;)

crz = cr2
obz  = obj

I uncompressed mine & then deleted the compressed ones.

When importing Sydney as a cr2 it took about 3-4m for it to load - importing PZ3 took longer - it sat at 98.3 for about 5 min before completing the import process.  Maybe it was longer as I smoked a whole cig & went to b/r before it was done LOL

Dragging up from the browser made no difference time wise.