Yes he tuned up the receive on it as well. and I have done nothing else to the radio since he worked on it. NO I run a company truck that doesn't allow kickers
If you want to run a kicker the radio needs to be tuned to do that or it will tear up the radio and the kicker!

I guess it all boils down to what you feel comfortable doing. I felt comfortable with who I bought mine from. This is after about 2 months of visiting local "reputable" shops. I either couldn't get a straight price from any of them or they couldn't fully explain the work they were going to perform! So that is why I went with who I did! Beware of the "Golden Screwdriver" techs in a relocatable building behind a truckstop! There is a reason their shop has wheels on the bottom of it!