Decca Jubilee and Morch / Moerch DP6

Folks,

I would like to solict experience sharing on the above combo. Specifically, I would like to know what arm tube or what mass would be a better match to the Decca London Jubilee cart.

In fact, I have UP4 and DP6, I would like to know which one would be a better match to the Decca.

Thanks