In one picture the oil sprayer for the front rotor looks like it is wound out??? if this is so it will cause low oil pressure (could be the root cause).
It is hard to guess over the internet:
But next time:
* Ensure those sprayers are loctited in and tightened hard.
* Crank is 100% clean (oil ways).
* Lube all parts with petroleum jelly (Vasoline) lightly.
* Crank motor till you have oil pressure before starting it.
* Check function of thermal bypass in front of crank and make sure its installed correctly to.
Short of any foreign material or grossly out of spec bearing parts aside from other things I mentioned in my first reply you wont *touch wood* have anything of this sort happen again.
Good Luck with it all
