I know this is a Juliet thread, but I’d still like to offer a word of caution on interior thinning; I’d tread lightly, as it’s been my experience (at least with the CJ’s) that these bushes require their natural intertwining growth habit to stabilize the branches under heavy fruit and leaf load.
Last Feb or March I cut my bushes down by about 4’, and while I was at it I decided to remove some of the interior to allow for better air flow. (Even though mine are on 12’ centers…)
In the end that turned out to be a big mistake. The branches drooped to the ground in some cases. I found myself trying to tie them up with string in an attempt to keep them off the ground.
I made a decision then and there that I would allow the interiors to fill back in so as to avoid this little issue going forward.
Anyway I’d suggest thin some if you must, just be aware that too much can do more harm than good. (Although I would imagine those who have chosen closer spacing, the fact that the bushes will eventually be leaning on one another would probably help some in those cases)