I haven't had much trouble with splitting in my 25 gallon SIP.
mgginva , I saw a while back where you had mentioned that RDB was one of your favorites and moving up close to the top.
It resonated with me because I am feeling the same way for my area , it is the first one I recommend folks try. I am adding more to my "driveway farm" next year to replace more average varieties. 

Mike , very glad the RDB is doing well for you. My tree came originally from Bass at Trees of Joy.
I think you should post your photos if you find time.

oh wow, I am now putting Ronde de Bordeaux on my wish list for cuttings 

Mr driveway
how ru

Hey Bugmagnet , hope you are doing well.
I know you have a lot RDB plants how are they doing for you ?

It is all depends on the climate,here:
One Summer will not split at all,and another will have part of the crop split especially after heavy rain.
Of course i am addressing it the best i can:
I placed soil next to tree ,in a con shape and placed bricks on all surface in an effort to make rain run away from root area.
This year  intend to place black plastic,first then bricks in top of plastic,and do that on a few cultivars that have tendency to split during rain.
In adverse climatic conditions,is an on going fight ,but where there is a will there is a way.