New XC owner here,

I made a mistake and ordered the wrong size rotors for my 2003 V70 when I bought them along side the brake pads . Should have ordered the 286MM. Totally my mistake for not researching and just went by the tire size. Anyways, it's going to cost me a lot to ship them back to FCP. FCP and IPD customer weren't much help and I didn't get any feedback from Facebook XC groups. Can I just upgrade to the 305mm? From my research it looks like I might just need the rotor bracket up in the front. Do the calipers stay the same and do the new brake pads also stay the same when upgrading? What about the rear rotor? The only size I see is 288MM so I think I should be good with what i bought. Any feedback would be much appreciated. Thank you