Thank you Shawn, yes I come from Teetering heads(could be a good name for a group), I noticed quiet a lot more precision when going from the B206 to the Gazelle and even more precision still on the 109, but was eager to know if the rigid head made a lot of difference, just as an aside why have the makers gone on to produce Rigid heads, are they less bothersome for servicing in the field or are they more robust, when being thrown about by people in a hurry!