No.
The Style's default front and back colors are that - just colors - NOT textured materials.
It's best to have a distinctive back-face color, so that in Monochrome view mode it's them easy to see incorrectly oriented faces.

Oh, don't worry. I figured it out with by locking the position and a little formula =Base Unit!LenX-3.2

I will add the new skp file so others can learn from it.

DC 3.jpg

Base Unit Dynamic.skp

i just happened to get the photo today..

SoFunYogurt_V1 102912.png

SoFunYogurt_V2 102912.png

SoFunYogurt_Preview_web.jpg

@cotty said:

Gerrit wrote about the origins for the guides groups, not the beams origin.

(@Trixta)
Yes, I was only trying to explain why guides may not be displayed in certain cases: when their insertion point is too far off screen.
Groups and components with real geometry (their edges and faces) are always displayed, even with the local origin not on screen. Just the guides may disappear.

If you have things like beams that are mostly the same, start with one component. If the last 10% (or so) of the geometry of one beam slightly differs from the others, you can make this beam component unique and do the rest of the 10% editing only to this unique component.

p.s. "Make unique" also applies to more than one component, to split a bunch into two groups of components.

@pbacot said:

Oh and the joints don't currently land on a joist.

Ooo! Thank you. Don't know how I missed that. 😳 There goes the profit. 😕