Having the same issue. Great thread, will attempt this tomorrow. I am mentally exhausted today having changed the engine oil and filter. Exhausted because me and spanners are not a marriage made in heaven and I was sure I would mess it up somehow, but it would appear (no drops under the bike) that I was successful. BTW i did not remove the lower plastic around the filter housing because the allen bolts were rounded out and still managed OK.
thanks again
Paul