You're talking about those alignment marks (yellow in my case). Well, I know about them and did the necessary adjustments previous time. Thanks for reminding, I'll make sure that they are aligned next time too (and I'll check regularly that they keep aligned).

I used this one. Is it so bad?

I just read on Aaron's Bike Repair website (at the bottom of this page) that they don't use any grease for the gears (ah, I obviously messed up, relying solely on Sheldon Brown's advice), they use Phil Wood Tenacious Oil instead, which they also apply to roller bearings and to the pawls (I applied it to the pawls too). Moreover, they say Do not use heavy grease on the rollers or the hub may slip but I think I used lithium grease for roller bearings, hence possible reason why my hub slips... am I right?

I've opened up my hub again, you can see some photos below (click to enlarge):



White lithium grease that I initially applied to the gears and roller bearings is mixed with oil now, I really don't want to clean everything using solvent and lubricate gears anew using Phil Wood's oil (I don't have much of it left), so what I'm going to do, I'll remove as much grease as I can using cloth and add more oil instead, and add some of it into the hub's shell again (as seen on this picture), this way I think I'll at least reduce the proportion of lithium grease relative to tenacious oil. Do you think this might help? I'll also add more waterproof grease to the outer ball bearings, because I don't think I used plenty of it last time, which is recommended for a good seal.

Thanks Dan, that's indeed for some other time... I don't have that tool anyway