How to prune Ulmus glabra Pendula?

I got a wishing list tree two years ago: Ulmus glabra "Pendula"

It grows so crazy much ( 1 to 1,5 m this year shoots! Huff! )  and I wonder
if any body would like to discuss how to form it taller by pruning and
maybe the best time to do it as well
- new shoots are creeping along the ground now - that is NOT how I want it
to be .. so I have an idea I need reaction on:

IF I pruned it now when here is autum in September - that would be the
pruning time that cause less regrowth - this I know from apples trees
researches.
Pruning deciduous trees while they are in winter dormancy will be the
pruning time the gives strongest new growth. I might try to make a half
bark  ring on the trunk as well to retard it some, but that still don't
form the crown

But I also want it taller - the crown - I know I can try to form up a
branch or three, but ... so I have a wild idea about pruning more or less
all branches very strong NOW - and see what happen next summer? or . do you
think I can risk an even more weeping tree

I could of course play with it like it was a bonsai with wire  to form
the  crown -- but that is maybe  too much job - I think so

- but what I know for sure it is that I can not let it grow like now ..
creeping around on the ground

Ulmus glabra is one of my favourite wild Norwegian trees -- but since it is
so big growing I could not plant that in my garden - so this Pendula was a
compromise .. at least I got ONE Ulmus I thought ,, it was very expensive
and I really need god advice because I want to keep it of all my heart!

Arnhild - Hardanger in Norway

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