Decided not to use the Vacuum again because of the resident cat whom is a bit scared of noises and whilst hes ok with the Vacuum i was unhappy creating a high pitched noise with the device again..

So I used a socket piece, as thats cylindrical and i could make sure it was longer than 19mm so in theory it shouldn't get stuck (but it did the first attempt).. As it was heavy enough you could locate it in the tube.

it took a couple of attempts because gravity wasn't doing its thing.

Thanks everyone.