I have a GT3 driver with the standard 8g weight. From doing some research online, sounds like the stock weight of the GT3 driver head with that 8g weight should be 195g but mine is measuring only 193g. I've measured a number of other things on the scale which all show to be accurate so I don't think it's a scale issue. Has anyone else had a GT3 head come in 2g light of what it should be?