Liebig size and element

[Sporacle]

Just a question if I am looking to upgrade (a small upgrade) the size of my boiler, in relation to my liebig (900mm long inch over half inch copper domestic plumbing pipe) the boiler i am looking at limits the recommended wattage if using a potstill head from 2400 down to 1900. My potstill head is a 2 inch column reduced down to half inch after two two inch 90 degree bends then onto my condensor. Is the limit imposed due to some potstill heads having a small outlet from the condensor thus having the potential to overpressure or get clogged if distilling on the grain, NZ Chris did mention something in another post, any guidance would be appreciated. Its a 35l boiler I'm looking at