Thanks for sharing
I agree with you that the Olsson Block is a must have if you print abrasive materials like carbon fill or even glowfill (i weared down my stock nozzle with glowfill very fast). But i must say it’s also usefull if you print less exotic stuff, for example if you print PLA and ABS, just use one nozzle for PLA and one other for ABS. This will prevent clogs if you still have some ABS in the nozzle and print PLA after with much lower temperatures.
Also printing with Wood filaments with a 0.40mm nozzle is hard, try it with the bigger nozzles and you’ll see how easy it is!
One last thing, to change the nozzle you can also print the torque wrench that you can use with the tools provided with the olsson block, this will prevent from overtightening.
You can find the torque wrench here:
For me it’s the best upgrade you can have on the Ultimaker 2