OK so to answer a few questions here from personal experience. I've had several skates that have been riveted and re-riveted a few times over. My current inline skates, Graf 7500s have had the original cowlings, removed those, drilled and riveted on CCM XSG holders, removed the XSG holders, drilled again to fit the current Labeda Predator chassis. Still solid. As it is, I am looking for a smaller sized chassis as the one that is on there is too big. So that would be another drilling session that would be needed lol. The bottom of these skates are looking like swiss cheese.
I've never skated with Tour Thor skates so I cannot comment on the flimsiness of the boot. But, when I first started playing ice I was in some shitty Bauer Supreme 1000 boots that were flimsy as shit. Then I moved up to the Bauer Supreme 7000 boot. As I said I have never held a Tour boot in hand but it looks to have a carbon weave boot so I am sure you'll be fine.