So no one called me on the obvious fact a 46 wouldn't fit on the inside
A special type of guard is needed, though I prob won't get one.
The mid chain ring has space to go to say 39 teeth, I'm going 38.
Way off road with heavy suspension bikes, the norm seems to go 34 teeth.
The idea here is to match your normal cycling speed to the chain line running to the middle of the cog set, in my case, I'm in too high a gear so a few more teeth up front and I'm sitting pretty.
The guard has worked good, took hits well, one pant\chain grab-though I haven't even tucked 'em in lately and no chain jump.
All said, I like the conversion and no dérailleur is nice, lighter and no noise\chain rattle when jumping.