I took a look at the code, and I found that the point of %mass was only to divide by %force. Doesn't that make it completely pointless, because you could just alter %force instead? Code in question:
%vx += (ServerConnection.cameraBufferX * %force / %mass) * %drag * %delta;
%vy += (ServerConnection.cameraBufferY * %force / %mass) * %drag * %delta;
%vx -= %vx * %drag * %delta;
%vy -= %vy * %drag * %delta;
Seems to me that it would be more efficient and more flexible (force and drag are independent) to just do this:
%vx += ServerConnection.cameraBufferX * %force;
%vy += (ServerConnection.cameraBufferY * %force;
%vx -= %vx * %drag * %delta;
%vy -= %vy * %drag * %delta;
The useless %mass variable is deleted, and because drag is not involved in the equation for force, it's a little more flexible, too.