Ive got the same setup as you.
I2, hexagon hot end gregs wade extruder.
I swap between .3, .4 and .5mm nozzles on the extruder when i want.
Ive gone direct drive so im not restricted on materials and it works fine.
Im getting 50mm/s and good prints. Abs, pla, ninjaflex.
I got the chance to compare it to an ultimaker 2 recently and my printer was just as quick and as good prints.
The hexagon and fan are a bit tight in the x-carriage between the smooth rods so i had to modify an existing carriage to get it to fit.
I also had to find a very narrow 20mm fan to fit in there.
Really must get round to putting the info online somewhere.
Gordon