More ideas for limiting influence of not perfect straight leadscrews… (mine are cheap ones from Aliexpress and either suffered from transport or machining process when going through “lather” processing from 8 to 5 mm.
Have tired this design with negative experience…in past
Could you elaborate? What happened?
With moving or hard moving simple to brake springs and in your case ear a big crash …just thinking how u can remove reduce #hulahopeffect (lol)
Flexible in X/Y but not in Z… Hmmm Looks like composite!
flexible coupling don’t work?
Again, it needs to be flexible in X and Y but not at all in Z. It’s what is indexing the whole bed level.
oh, sorry 
No pb… 
I’d rather answer twice than miss a potential good suggestion.