Welcome AlvBo! I've only been running Mini-Zs for about 6 months and have learned alot from the Great Guys here!
I have seen pics of others running box stock with splitters ground down/removed, so I would THINK it's ok. But I'm not runnin nothin, so I would get a 4sure answer from the guys in charge before doing any changes!
Get ready for some challenging fun!!! Drew