Would would pouring concrete in the conduit make it more ridged especially in the parts that don’t move. It might be to heavy for the steppers but i wonder? Any ideas?

It would but not sure how much, tubes strength is the outer most layer. A larger diameter tube is the easiest way to gain rigidity.
Are you having rigidity issues?

No just ordered the parts kit from you today i was just thinking out loud lol. The concrete could dampen the vibrations if were are any. Once agan thinking out loud lol. On a side note when do you think the parts kit would be sent out?

Steppers just arrived 30 minutes ago. I might be able to catch the mailman tonight, if not in the morning for sure.