41.65+ construction

[Cele76]

Can someone shed some light on what function are currently in use for construction in 41.65+.   Was trying to fix/rewrite some old mods that make use of the buildUtils and BuildMenu system from pre-41.65 and have had no luck.     I added debug lines into the lua files to see what was being called for wall construction and have not been able to figure out the wooden wall contructions.     I can follow the wall frame but can't tract down what is being called when you build a wood wall level 1 thru 3.  

 

Thanks