Are you running any of your DLE's with a multi prop bolt setup?? I don't see a 5mm spinner bolt listed from TT for this purpose.
The hardware TT sells for the DLE 30 is for use with the single bolt conversion, not the with the stock multi bolt setup.
When you factor in having to pay TT 10 bucks to custom drill the backplate and provide the correct bushing so the spinner runs true with the multi bolt setup, I think the using the single bolt prop adapter makes things easier, that's all
Pete