Frank
I will get back to you and in the meantime measure the thickness of the ring. Or just find that dimension from someone who will measure one that is apart. I just got my DLE30 all together with the new rear carb induction kit. It runs good, but I did notice the ring is still no where seated yet. It does use a pin too prevent ring from rotating. Will keep in touch. I will PM you for your phone number too, so I can call you. Thanks Capt,n John