Grinding

I did a little test ride the bike to iron out any kinks from the maintenance.  Everything seems to be in good working order with the exception of one little ittie bittie problem....under load, the drivetrain makes a grinding noise.  I need to check alignment of the chain and also put some lube on to see if that will make it go away...if not, time to put on the inspector glasses and try to figure out what the source of that is.  The chain tension is fine so it is not that but it might be a combo bigger chain and smaller chain ring although I think that is doubtful considering it is a niner chainring.

I have 2 days to figure it out so the clock is ticking....