Your easiest and quickest fix would to be shim it like everyone else has or to cut the ring loose where needed and glass and glue correctly.
THE DLE-60 twin performance and weight don't seem to lend itself well to 3D. I have seen people using 22" props on them in the forums and they don't seem to match the performance of the DLE-55. 1.9 kilos versus 1.5 kilos with close to the same rated horsepower.
I love twins. I have been using a PTE-72 and plan on picking up a DA-70 in a few weeks at WRAM, but the DLE-60 just does not seem like a good return on $550.
There is a video floating out there with this motor on a Aeroworks 85cc Extra 260.