I do not have to remove the oil cooler to get to filter , the Brocks CT is fine for oil filter change . I do put plastic sheet over the exhaust area under the filter , and I do usually run the K&N black filter with nut , if I haven't scored a oem . I haven't seen or heard of a K&N motorcycle failure in OZ , of course they would have to happen if you count in every vehicle type that use them , but really only ever have here on this forum . Maybe more careful with export examples ... I don't know ?
Anyway , be sure to Vaseline your fairings rubber grommets and the related plugs . Be sure to never be in a hurry and always get as physically comfortable as possible in a good position to replace the side fairings etc. .