Hey it's cool when someone posts a link of you own car as above cheers guys stoked I thought my build was shite but obviously not lol but back to question ! No it's not hard at all mines xr4x4 but same principle with rs500 I could easily make it look rs with a vented bonnet and open grill but I quite like the standard xr front plus it depends what you are putting in as power you don't want people to think oh he has a cossie lump init if it only has v6 or slower cause it could be embarrassing lol. But it's a simple wing swap although I would suggest changing front panel so lights and bonnet latch fit proper I didn't and it took forever to get the lights mounted well and I pinned the bonnet cause I couldnt be bothered to fit the latch lol ! Good Luck mate