The engine mount was bought from Cozy Girrrls, and responds to the early concern over cracking by adding extra bracing. Cleaned with alcohol and acetone,, then painted iwth a zinc chromate primer and appliance epoxy. The engine is secured to the mount with Dynafocal mounts made by Lord Manufacturing (a division of Parker Hannifin). For the build / dummy engine phase I used the mounts that were used in the build phase for Andrew Anunson, then build phase for Hugh Farrior. As near as I can tell they are the heavy duty mounts sold by Aircraft Spruce for the Acro and Christian Eagle - aerobatic biplanes. I've had them on and off a few times and see no distortion. On 5/26 I corrected an earlier error and moved the large diameter washer to the compression side (for upper Dynafocal cups, the firewall side, for lower cups, the engine side). Moving the washer had the effect of raising the prop. With tires inflated to 60/60/55 and all 4 thick washers on the firewall side, the bottom of the prop extension was 45" above the floor. The new measurement is 46". Prior to fitting the cowl I wanted to switch over to new mounts. I bought a new-in-box set of the mounts specified for the Cozy: the J9613-40 originally spec'd for the IO-360-A3B6D. When the inner gel capsule burst I used the customer service email at Lord, sending in a description and pictures. That was Memorial Day. Now it is 7/13. I called again (877-275-5673) and left a message with technical support. I may or may not change over to the new mounts - the old ones have not deformed in any way. In January 2019 I spoke with customer service at the Lord mount division of Parker Hannifin: I described the pusher configuration and mentioned that it was common to use a prop extension. That news made her recommend a stiffer mount, and to avoid the ones with the gel capsule dampers. I infer that the mount is dealing with the vibrations created by the prop as much or more than the vibration of the engine. A prop extension is a longer arm to the prop vibration, and merits a stiffer mount.