danno858 Most welcome! Me too. Although - that guy has actually done it. He opened up his P-515.
I'm 'living' to get my chance to later open up a P-515 or P-525. I had been collecting various lubricants - for that occasion. My fingers are itchy right now to get an excuse to open one up! These are the lubricant choices I have so far. Other people 'swear' by their own types used though - but I'm going my own direction.