I did a crazy fast benchy in 3:56 min.
I used Paxx extended firmware, to increase the limits of the machine.
I used a fan on the heatsink of the stepper drivers to cool them.
And i Frankenstein’d a hotend; bambu TZ2.0 heatblok grafted on a U1 heatsink.
Well i bought a snapmaker U1 and a bambu x1c TZ2.0 clone hotend from aliexpress.
Ive drilled out the meltzone/heatbreak out of the U1 heatsink(4mm)
Drilled it deeper so the TZ2.0 fits, drilled/tapped insert screws and the 2 screws holding hotend (m1.6)
Not easy to do to be honest, you need a drillpress at least.
With the TZ2.0 you can change the nozzle, so i changed it to an bambu/tz2.0 brass/CHT nozzle 0.4, giving me 38mm3 flow for PLA@230c using the orca max flowtest.
The stock stainless hotend was for me 24mm3 flow for PLA@230c
It is quite of work, my u1 it is still on the way bit o have some aftermarket nozzles to take a look at them at least.
I think they are pressed, maybe i will find a way to heat the radiator part and cool the tube, to take them apart. I do not have a drill press and is no way to doit by hand.