'Andy' it's the 'jaba' donks that is the issue, as I said 2 of them twice the chance of failure, the airframe is just dog ulgy that's a separate issue more of a personal nature:-) Obviously my ref to the above relates to all twins that are marginal on one donk there's no argument there lots of documented cases of excursions Blw VMCA.
The push-me-pull-me is still scarey losing one on T/off especially the rear, the most efficient one of the two.
Wmk2