.
That's not all that practical an idea.
You have to mount a scale upside down on a ceiling.
Most ceilings are beyond arm's reach.
So you need a modeller height extender to start.
Then you need to have a helium enclosing device added to the scale.
Duct tape or CA might work here.
And then you have to add enough helium to the device to get 97g worth of lift, as shown by the scale..
And then you have to transfer that helium into the aft fuselage.
Quite a chore..
Using a heavier motor is easier.