Arr right, you got the Aldi one. I've got one of those and now a nilfisk but I want to source a 51mm inlet - the whole black plastic bit. Most guttervac suppliers fit a cyclonic one - sort of fits at an angle so the crud shoots around the drum rather than straight at the filter.
Where did you get your inlet may I ask?
Aid Cleaning Store,speak to Adrian,he has been in the game for years,knows what hes on about.
Here is his number 07831287395