It has long been thought that pipe organ is a tough coral to get to do well. I believe this is because it is so fragile. It is so britle that just picking uo a piece of it causes the tubes to brake. I was scared of this coral for a long time from how much bad I heard about it but I was sent some by mistake a few years ago and it did awesome. Since then I have ordered it in several times with mostly good luck. It all seems to be in the shipping weather or not it does well or not. If it gets warm or gets beat up during shipping is does not do well.
I have several small pieces (quarter to silver dollar)and a couple large pieces (5" to 6" across)in stock right now if anyone is interested in trying some
Joel