Does the bracket have a slot to hold the outside of the small rule?
I wonder if any tweaking will be needed for the small rule if there's any slop(from brand to brand)? I guess the question is... are all of those rules close enough to eachother? Is there a way we could adjust this fit? What was the basis for your dimensioning of this? Maybe you could base it on say a Starett rule that you could buy or direct people to buy in case their own rule has too much slop? What material is the bracket - Al? SS? Plated steel?
I'm in. Let me know if you prefer paypal or a check and give me your address for the respective prefered payment.