Viburnum opulus (Guelder Rose)

Hi all, this Guelder Rose was purchased from Kaizen Bonsai 2 years ago. Hope you like it. Been re-potted into new pot. Any advice on pruning techniques would be very helpful.

That pot is really cool, I like the cups on the corners and how they echo the hollows on the trunk where the former branches were, its a VERY non traditional pot but it works really well for this tree-good choice, and thank you for another Potter tree.
-Jay