Well, decided to do an oil change on the Spada today. Sump bolt off, albeit a gentle persuasion. Sweat, warm oil trickling down hand and into the catch pan. Next, filter cover bolt off....WRONG! Half an hour later still struggling, sweating and bolt slightly stripped. So I decided to wave the white flag and call my bike mechanic. He informed me that, yes they can get a bit tight especially due to the o-ring. He suggested that a good fitting socket and a long handle should do the trick. Hmmm...seems I can't get to the shops for a while, so i decided to replace the oil but leave the old oil filter in there momentarily. Is this really bad?? Btw, can anyone recommend a good socket set (one that has a long handle)?? it will be much appreciated.