Holzfforma G372 XP Milling Failure: Teardown & Next Steps

What route I should take in rebuilding this saw and what advice do you all have on how to avoid blowing it up again. This is a Holzfforma G372 XP from 2019. I had two Archer milling chains to mill this rather large spruce tree and a limited amount of time, so I swapped the chains back and forth and pushed through so I could get my hog pen done before the piglets arrived. Saw never really ran great and I adjusted the carb several times to try to get it to run right. Two new Granberg milling chains arrived and I tuned the carb again and started on another large spruce after making the first cut the saw would not start back up. Checked carb screws they were around two full turns on the low and hi screws. No amount of of adjusting could get the saw to start again so figured it was time to take the top end apart.