SC2Mapster

Use SOps like SOp(Local Offset) and SOp(Explicit Rotation) on the Unit type actor for your structures under the hosting fields.

Changing collision would require altering the model using something like blender or 3dMax.

Under the Ability: Abilities - Ability field of the unit you are wanting to construct.

I again refer to the second part of my answer.   Do the units you are trying to build have the Buildable ability?

What mover is your Build ability using?

Does your taldarim structure have a Buildable ability?

This using a custom Build ability?   Check the Protoss Building Birth actor.

Under the Ability: Abilities - Ability field of the unit you want to build.

Your first question was rather confusing as to exactly what you want.   Maybe you could bullet point what you want?

Are you talking about the Model type actor created by most structures while under construction?   Or are you saying when placing the structure it ignores the build time and is instantly created?

Sounds like your new structures are lacking the Buildable ability.   A lot of the construction Model type actors have a list of all the structures they are created for.   Else in deleting your actor you have removed the actor event to create the construction model.

For your second question use a Model type actor.   Set the host subject to your Unit type actor.   Finally set the hosting site operations to what you want.   Check the tutorials forum since there are several good ones including those by ProzaicMuse and OneTowSC.

It has been years but finally all abilities pages have been transferred from the legacy wiki.   May the rest follow shortly.

You would be surprised how just one trigger action links together so many of the campaign data types.

Reply: GlornII,

I think the question was more how to use the specific game feature than how to achieve a similar result.