I had a problem with the older 759G and it caused the o-rings on my HD45 to swell and make it difficult to turn. But the o-ring on my PD is silicon so it may be different. I have had great success with the Sandwich shoppes 50/50 Krytox on my PD, quite thin and super smooth... http://theledguy.chainreactionweb.com/product_info.php?cPath=48_80&products_id=710
although I guess if you have nyogel you may not want to get the 50/50 as well,