The blade gap should increase as you go from low settings to high. I don't know if you will see the difference in blade gap between individual settings...say from 2 to 3, or 5 to 6, they are pretty slight. But you should notice the difference between 1 and 9.
https://www.youtube.com/watch?v=LAs1Mns_MS4
No apologies needed. The higher the setting, the more aggressive the shave. It is recommended to open the razor before changing the setting. Then close up and be sure to make a final 1/4 turn to set the blade.
Enjoy the shaves!
Go until it stops. Enjoy your Slim, they're great razors.With regards to the last 1/4 turn to lock is it just a quarter turn or is it all the way till it stops turning which is roughly a quarter
Regards