I tried last time to get this, but only managed 100 parts before it expired. I was at level 90 or so at the time. It was a lot of work to get the drags evolved, to collect the bombs needed, to generate enough parts, etc. Now I’m at level 145, I have lots of drags, I can evolve continuously, etc.
So it depends on a few things, but I really appreciate the repeats as it levels the playing field for lower level players or folks who don’t spend gold, like me, lol.
FYI, I did the same with the last mining dragon, I only had 150 parts from the last time, so it finished up nicely. Cheers.