How to scale a 3D Warehouse object plus another problem

I have just started to learn the Sketchup Free Online version using a tutorial series I purchased through Udemy.

I am only interested in creating models for very simple woodworking projects.

After learning the basics, I tried modeling a simple dolly.
When I went to the Sketchup 3D warehouse to find a 2.5" caster, there were no specific sizes.
I downloaded a caster type that fit what I wanted, but the size is wrong.
I don’t know how to get the size of the caster to 2.5" and all the surrounding components to fit in with this scale as well.

The size of the downloaded caster is something over 4".

Another thing that I had a problem with was one of the lessons in the tutorial series.
This lesson started with making Tape Measure guide lines of 118" (nearest measure for imperial from metric) from the green axis once and then another 118" from the first one.
The first part of the lesson was to then take the last guide line and make 10 simultaneously.
Then there were two more guide lines to make going across the now 11 guide lines.
So, what is left is a kind of grid, 11 long vertical guide lines and just the 2 horizontal guide lines.
The next learning part was about the 3D Text tool. There was text to be written in a few of the squares which had to do with learning how to make a pyramid, a prism, and a sphere.
My problem was the tutorial video would navigate around and the text would stay in place on the grid, mine did not.
When I navigated around the Tape Measure grid and the text were like two different things, the text did not stay in place on the grid.

The instructor never mentioned any way to keep it all one entity.

Is there a way to do this with just a Tape Measure guide lines grid?

The right moment to learn to model it yourself, instead of downloading a model that can be high-poly or poorly created.

Basics of SketchUp at

  • just as an idea of modeling a low-poly model

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Sounds as though you might have used the Text tool, not the 3D Text tool.

The former kind of text always faces the viewer, so it appears to change position as you orbit the model.

The latter is fixed in space.