Interesting choice on the sulphur denitrator . Am sure you will keep the thread updated on your experience .
I had experience with them long back in 2002-3 and it was a little hard for me to dial in the flow at that point in time especially with flow. Too slow a flow and you risk dumping toxic hydrogen sulphide in tank . Thought Randy had a wonderful article on it . But again - its no different in tuning the flow than a CaRX , so should be pretty easy .
Mind if I ask you - why not look into methanol denitrators ? I have used the crude NatureReef when I used to care about nitrates and phosphates and what not and they ran pretty much amazingly . You can get any acrylic fabricator to build you an amazing one and it requires way less maintenance too .
I do have plans for one but not for an acropora system

soon