Hi stephaniie!
I´m one year post op, both srs and ba, Gennaro was also my surguen and I got the same Dilators you have.
I have never used any other dilators, and I´m sexualy active, and there has been no problems at all!
I don´t really know how it works, but it does, becouse i have certanly have guys bigger than the largest dilator we recived. The only thing that was a bit tricky att first was to pass the "entry" but when its gets in, its all good.
I actually contacted the company that makes our dilators (the company is placed in UK) And they have them in aaall sizes, and you can order from them!

I never did, becuose as I said, it workes perfectly well anyhow