Light spackle weigh next to nothing.
Same for glue in relation to the total weight of a model.

It is beyond my understanding and intelligence that so many people are constantly mentioning "extra weight" in relation to glue and such things as filler for small fissures.

What will anyone notice in the flight performance of a 32 oz model if and extra 10 grams of glue or spackle makes the model much stronger or of better appearance.

Same for a 10 lbs model if there is an extra 2 or 5 oz of extra weight.

So many do not seem to have a feeling for "what is going on ?" about a model airplane being pulled throught the atmosphere by a thrust force no matter how that force is created.

A similar situation exist about the forces acting on the control surfaces.
Hang your model with a string on the engine shaft and let it be supported by a helper just off the floor.
Now with your finger push on one aileron or a wing tip and see how much force is needed to make the model rotate around the lingitudinal axis or stop it from rotating (like opposite ailerons to stop or control the banking angle).

Will anyone tell me I am wrong and straighten me out ?
You are welcome and I am anticipating your responses.

Zor