I can't speak for Powerfly holders, but had no issues mounting Lightspeed Edge holders on Sharks_Throwaway's SVH skates. https://www.instagra.../p/CnC8IvPyU1O/
Since the True holders are symmetrical while the Tuuks are not, some holes will not line up. I recommend epoxying those holes and re-drilling, as well as using thin plastic inserts under the insoles so the rivets can grab on properly.
I think my scan is creating the gap as I am getting the same on on the edge holders as I am with the new powerfly (my foot supinates so my boot shows that) - I was more or less just wondering if anyone else ran into that.
As for the epoxy, do you have any recommendations? I was on the fence on epoxying or just leaving some of them open and widening the others but with your recommendation, Im thinking its probably safer