I easily removed the S bend pipes, but the "last piece" actually in the sink is leaky.
(I do not know what that piece is called.)
Notice I've got it a bit loose .. close up ..
close up underneath ...
is there a special tool for this maybe?
notice the last large image - that large plastic turnable collar/bolt - in fact, is my problem just that I have to turn that? It's very hard to turn more, unclear if it can turn more. (If so I will get more purchase on it and do so, but maybe that's not the issue?)
last image - notice the black flange-thing against the white sink, has a kind of notch to our left - is that relevant to my problem ?!
notice the unit has the "stopper inside the drain". I hate those, so, I will ideally replace it with just an ordinary plain one, no stopper mechanism. (So, up top the silver pull handle behind the taps will just do nothing.) Is that OK, no pitfalls?
If it works out, do you use a sealant?? or such putting the new piece in?
Finally - I know every detail of how to, say, plaster a wall. But I always get a plasterer to plaster a wall! Is this one of those things where you really need someone who has done it 1000 times, to end up with a perfect seal? (The whole point here is it has a drip I can't beat.) Should I just get a plumber?
Maybe I have H.U.A. and the drip is not related to this, I mean, perhaps replacing this piece is misguided in some way?