My friend used to have one of these he didnt do too much to it though. But I remember he changed the bolt to a Shocktech bolt and it seemed to make it better
Rodeos can also have EFrames added to them I think
Dont get an ACS bolt, a lot of them have had problems and just snap. Honestly, maybe get a fast hopper, then an egrip and a clamping feedneck. After that just leave the gun alone and start saving for a new one.