When I use this to plan in bobs mods, it generally works but there is a problem with assembly machine selection in certain recipes. Certain recipes that allow the use of the electronic assembly machine cause a problem for the UI. There is no way to select an assembly machine, so I have to manually type in the stats for the machine.

Also is it possible to set a default machine instead of only using the assembly 1?

I need more details, normaly i can select a machine
perhaps u need remove filter in the options menu

could u make a screen shot on ur problem

https://github.com/Helfima/helmod/issues
or use forum
https://forums.factorio.com/viewtopic.php?f=92&t=30465

I have submitted the issue on github as you suggested.

I look at this evening but for factories there circumvention look at my response
u play v0.13? or 0.14