Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
Used and abused my rig in the bush for 3 years now, never had an issue with things hitting the sump. As the diff sits lower, it will cop anything. Only issue would be if a stick or similar gets wedged in between, but in over 11 years of offroading in multiple vehicles, I'm yet to have that happen.
As for the shaved diffs, it's becoming more commonplace. I believe Bidders in Cranbourne do a good job, around the $700 mark if you just take the empty housings to them.
I know a couple of people that run shaved housings daily and haven't had any issues, but only had them about a year or two. I'd love to do mine, my 35's would basically be 37's or so, or I could go back to 33's with the clearance of the 35's and not have to worry about the plods. All $$$ though, and the minister of finance isn't keen on me spending any more on it.