Aren't you supposed to ride them without the FP Insoles for testing? I have no idea if that's the case, but...
Nope, no need to test these. Been skating the 598 about 5-6 pairs deep now, great overall shoe.
I also haven't used stock shoe insoles in about 5 + years. The last shoe I had to use the stock insole was the Koston 3.
Since FP and Remind have wide soles, it was hard to get the fit right on the Koston 3. So I used the stock ones, those are good too. At least before the Lunarlon flatten out.