TRD center caps & Bongiovi

I picked up my TRD PT904-35070CC center caps today for my 2012 TRD DC, when i installed them i found them very loose on my 17" rims and was able to pull them off with my hands again. I have read on here that with the 17" Sport rims you don't have to mdoify the caps in any way, can anyone confirm this?? Am i maybe not pushing them on hard enough ??

Also while i was there i told the salesman that sold me the truck about how aweful i thuink the factory stereo is and he told me about this Bongiovi plug and play addon, i did a quick search on here and it seems like very few people have tried it. Has anyone put it in a 2012 ??

 

I did this to my 09 and my new 12. I found that putting a strip of 3m double sided emblem tape from autozone on each tab works best. Never lost one in 3 years on my 09 or in the last 4 days with my 12.