That's great! I would do just as you said, the Schulze one first and then Hulda Blast - o - matic! Here is my reasoning . . .
With the Schulze tinctues, the L/GB formula and the Detox, (and by the way you have to write and tell me your expereince after you taste them...yiiich! lol)...anyway, they do lots of good stuff like kill parasites. This will ultimately make the Hulda flush more effective than if you had done it first, I think.
Also, I don't know if you have ordered any of his Superfood, but if you have it and take that as well, I noticed last flush I did that it has malic acid in it, which is a good stone softener. Softer stones come out more easily. Barring that, I would try to drk as much apple juice during the 5 day Schule thing because that has malic acid in it was well and will be a great prep for the Hulda flush.