Used bike build

I just built this bike up over the winter and I don’t have a lot of info on the frame. Just that it’s an Echo Urban 26” and by my measurements it has 1015mm wheel base (fork is 40mm-ish offset) and zero bb rise. And the serial number starts with 2001 (is that year of manufacture?)
I guess my biggest question, if anyone knows, is should I be expecting the IS mounts on the frame to fail, like, instantly, or there a chance it will be okay? They seem puny and from what I can find later models had a lot more material for reinforcement…
Thanks for any info you can give me.