I don't own a Sphynx yet; so I can't offer you much personal advice on any of the grooming techniques that she recommended. But, to me, it does sound like she cares about Harry and wants what is best for him! So that seems good to me. The whole thing about 2/5 of cheap litter and mixing the 2 brands seems odd to me. I like to just use 1 at a time...but, that's my preference. To each his own. And the whole thing about feeding an adult cat kitten food doesn't sound right to me. After a year of age, that is when you typically start feeding a cat adult food. Sphynxes do have faster metabolisms for heat; and do eat more than the average cat, but that doesn't mean to me that you should be feeding kitten food.
Alright, well, Good Luck and please keep updating us! I bet you are excited to meet him.
Alright, well, Good Luck and please keep updating us! I bet you are excited to meet him.

I really hope it turns out that you get the baby you have had your hopes for.