Just asking a quick question. You're not concerned about fatigue using a high tensile aluminium bolt in a mount like that?

We (Dad and I) had a Zenoah G62 (horrible, vibrating, petrol thing it was) mounted in a similar fashion and high tensile steel bolts (passing through rubber isolators on each side of the firewall) were breaking one after the other. Every dozen or so flights we'd find another broken bolt. General purpose steel bolts put up with the flexing much better. The DA is a much more refined engine and maybe it's not an issue?

Thanks for the build log...