I don't get why some folk are so determined to try and discredit the value of a CSV. Reducing cycling can't be a bad thing and constant pressure has to be better than the ups and downs of a traditional system. I wish I could use a CSV and have higher pressure and volume but the damn micronizer I have for iron fitering prevents it.
Oh and.........I don't sell pumps, I buy pumps. I also don't sell CSVs.