reducing

Any body knows what is the exact weight of a Warwick stock tuning machine? I am considering swapping them for ultralites or similar to reduce the slight neck dive I get in my Streamer. I have to know the exact weight in order to determine whether it would be a significant change with other...

OK, I am going to use a larger guage string and will need to lower the string tension. Will I need to lower the bridge? Is there anything else that iwll need to be done?...