POLECAT. You say your E-3 tires started to wobble after 20,000 miles usage. First of all, any motorcycle tire that last anywhere remotely close to 20,000 miles must be a darn great tire to begin with. And in the second place running any motorcycle for that distance is just out right crazy. Polecat, forget about wobble from the tire, you are lucky this tire didn't have a blow-out because of high usage, and mileage, and then had something worst happen to you. I'm in the automotive parts/ repair business, and was told a long time ago that any tire will have a 80% change of any problems, during the last 20% of useful life.
Also I wasn't sure if you were talking good, or bad about E-3. Whatever, but on my 1500, I have had the E-3's on for about 8000 miles, and are as good as when I got them. However, I'm sure I'm sure they are not going to safely last more than 12,000 to 15,000 miles, and will not push for more, even if they might still look good.Remember, all motorcycle tires are cheap, when compared to everything else that they connect to, including yourself.
And oh yea, several years ago, I had a rear tire blow out on my old 1100.
Lucky I was only 2 blocks from my house, and travling maybe 25 mph at the time. But this was after putting some 200 miles on that day.