speedxl- I figure I have to be right once in a blue moon

lol.
MikeD- Are you also running non-AE lower arms? I know that some other 12th scale companies make their own, since the AE ones are extremely inconsistant. And if so will IRS be making them as well?
And on the IRS 12th scale diff, does anyone know what size the screw is on the left side clamping hub? Thanks