[X(]OMG!! That would be a nightmare!! I'm amazed that you were able to get it down that fast. We have three guys flying our blimp and each one has his own ideas about what the best bouyancy point is. We hate to weight the thing down very much if we're dropping t-shirts on the crowd but also we don't want to lose it if the batteries die. We have several large pieces of lead that we put in the gondola and then we use 1/2 oz fishing weights to fine-tune. Its really amazing what a difference a weight as small as 1/2 oz can make.
I'm attaching another MPG file. We asked the announcers to put in a small ad for our RC Club and so now we get a little advertisement in each half.
http://home.comcast.net/~tburgess50/GoodCRCCAd.mpg