You fellows have me out gunned by a whole bunch!
The largest diesels I've run to date were .09s, and I can't imagine a .90 stump puller on my bench! My PAW 2.5cc is still NIB, and that is the largest diesel I have ever owned.
Most powerful model engine I've ever run was an Enya .60 III al-chrome, and it drug my test bench easily. Wonder how that would have run as a diesel?
Bill