Both my front calipers are seizing up therefore I've got two refurbished units and new discs and pads (front and rear) and brake fluid on the way. Have found plenty of info on replacing the discs and pads which looks doable, however I can't find anything on actually replacing the calipers. Can anyone offer any advice please? I've just taken all the wheels off and WD40'd the nuts on the calipers and carriers in prep for the job. How easy is this job? I've recently changed my air, pollen and fuel filters as well as changing my thermostat, CTS, cleaning EGR and mr muscle job so am feeling quite confident. However I'm scared tackling the brakes is one step too far? Also, I don't have a proper jack or axle stands so would I be silly to attempt this using the audi jack? Any advice greatly appreciated! Thanks, Dan.