I use the rear carb DLE 30 and didn't have to cut anything! Did you use the DLE standoffs? The included standoffs work perfectly. It puts the prop hub about 1/8" farther out than the G26 but that's OK! You can't even tell. And the lighter DLE needs to be out a little farther anyway to help with CG.
I found that I was still a little tail heavy so I put my Sullivan smoke pump on the firewall and moved the receiver, pump and ignition batteries directly under the fuel tank. Perfect! This airplane is awesome with smoke!!