One thing to remember is that the Lull headstock is shorter than Gibson's, so it could equal out. I knew someone at Mono whose Lull Thunderbird (regular size) fit in their M80 case, where my Gibson wouldn't. Not sure how much length the oversized body adds.
Oversized body and headstock both.
Question re your black hangers. Are those Hercules? And they mount properly in the Diamondlife slats?
Yes and yes. I have several off the regular diamondlife, but when I needed more they were on backorder.
The "Rockbag"TM I have holds the 67NR, but is actually too roomy. I hafta add rolled up towels and other [stuff] to keep the bass from flopping around. PITA.
Hmmm. Rock bag...