ORIGINAL: cavandish
sounds like a good idear, especially as it does not involve taking the original plate out. limited vertical support unless you are looking at 3mm plus alloy, also won't you have to cut the cowl a little ?
i will use 3 mm aircraft grade aluminium as this is very light and also very strong, i only have to cut out the very end of the cowl just so the alloy plate fits in but if i use a pitts muffler no extra cutting to be done.