I've not done much to mine to date, just planted and that's about it. I've pruned some for height on the biggest one last year, and some lower branches on all of them to allow for mowing, but so far that's about it. Mine mostly all seem to grow several inches on a single trunk then branch out into the shrubs they are now.
I hadn't gotten around to pruning while dormant, and now lately we've been very, very wet. Of course now we have little green dots all over them as they're beginning to show leaf. Now I don't know if I should prune now while we have a few dry days, or just resign myself to thinking I missed my best shot before they broke dormancy, and just not risk any disease issues and wait until after the fruit is harvested this year...
May do some pruning on a couple just to see how it impacts them.... IDK, really on the fence.
I'm darn envious of Don3a's yields on his more manageable height bushes. I think he has achieved the optimum. High yield on 6'+/- bushes. I get the yield now, but they're going to the moon! Grrrrrrrrrr