Actually, bearing in mind the bits have already fallen off, is is better to just leave it rather than buying another and risking parts of one that falling off too?
I guess that comes back to the original point of is the seal good enough 
Bits are in the sump and you have a vacuum leak, which you seem completely indifferent about, but keep posting about it regardless. God people are weird these days.
Did you get out of the wrong side of bed
It's a forum and I'm simply asking questions.
You have already said your new one has broken, so I'm just considering whether getting a new one myself is a good idea if the chances are that it may break and add more plastic in the sump.
The vacuum part I have no idea about, and I am not aware of any performance degradation, but the general opinion seems to be that it is an issue, so on balance I think I will get a new one.
Peace
