REGION RENDER and bucket size

Hi,

We're using the solidrocks .97 however I can't get the render region inside the vray frame buffer to work while using the vray frame buffer and distributed rendering. Actually, I cant get it to just calculate with DR in any way. It usually just calculates LC for the entire frame unlike the last version.

.97.8
If I choose distributed rendering and share LC like in the previous version it will calculate the entire image BUT render the region. T His is not ideal because the prepass is not calculated by the other machines and the LC takes longer to calculate.

In the last version it would calculate the LC for just that area and work with DR magnificently? Is there a different way to preview small areas of the camera view using DR in this version?

Lastly, why can't we choose the bucket size. There should be an override like everything else. Otherwise the script is amazing and a time saver. The first question is our priority for obvious reasons.
Thanks