I used the same approach as usual, so just posting pic of the shrub out of the ground, pruned and root pruned. It lost a lot of roots, so I pruned the top back heavily as well.
Hard to see here, but the trunk is about 6 inches in diameter. I've been pruning to keep it compact for all of it's life. I suppose if I had not, it would be a tree now.
Not posting as a "how to" so much as a record for future reference. I want to see if it survives. I think it will be fine, but next year a but less vigorous due to root pruning.
Even without moving a shrub or tree from one place to another, root pruning is a legitimate technique to reduce vigor. Not as extreme as this but I think it has adequate root to survive, and there is fall and early Spring to regenerate feeder roots before top growth commences. The shrub will restrict its top growth based on the available feeder roots, so it be much more likely to survive than if I had done this while leafy.
