That never happened , sorry.
Some audiodealer i will not mention here owned me some money , and the colibri should have been part of that deal , but he choose not to keep up on his part .
The case now is a juridical one unfortunately.
But i have good news , i bought a Moving Iron london decca cartidge as there were some raving reviews about them.
I have the london decca supergold now playing for a couple of months and i think its the best i ever had .
No need for transformers you just need a (tube) MM gainstage .
That thing is very microphonic /sensitive its also very dynamic , full of body and detail.
I think its a gamechanger , i have not touched my mc s again.
Retips are cheap , so is the cart, i will buy a reference later this year.
I m sorry that i cannot comment on the colibri.
I dont have any plans for upgrades at the moment as i am very happy with the soundreproduction , although i have plans for another (better? ) speakermodel .