Axle upgrade questions

Went ahead and replaced the 4 tires with Maxxis 10ply. Had them mounted and re-installed them yesterday. Also have an appointment with a truck shop that can do axle alignment to have them evaluate what else needs to be done. The only other thing that worries me is when I did the CRE3000 with heavy duty shackle and wet bolt kit, the brass bushings were all very easy to put in. Prior to installing I watched videos and some needed a press to put them in. Mine all went in by hand easily. I hope that does not mean the springs are worn as well as I intend to keep them. The factory bushing were totally destroyed when I replaced them but with a 3 yr old trailer I sure hope the suspension work is limited to the axles and that the brass bushing upgrades I did are enough.

Thanks again all for your thoughts and help.