Changing only one hotend size / 0.8mm print speed

Snapmaker J1/J1s
1

Hi there, Is it possible to change only the right hotend to 0.8mm and keep the left one at 0.4 or do I need to change both at the same time to 0.8mm?

And does anyone of you have experience with the set of 0.8mm nozzles on the J1? How fast can you print?

I wasn’t able to find any information about that.

2

The J1 has no problem to use different nozzles on both hotends, unless you plan to use mirror or copy mode (in that case the same gcode is used for both nozzles and these have to be similar for that reason)

But you need to correctly set up whatever slicer you use.