I was all worried over going 2x the recommendend interval since here in Colorado we are basically dust bowl. Well following Steve Saunders video the change went smooth. Took probably 3hrs, but I was in no hurry. The old filter at 25k was not even half what I would call used up despite living here. I'd say 35,000 mile change interval is plenty. Taking the top shelter off should not be a big scare, putting on that seat that I hear is terrible went smooth. Easy job with a little care and patience.