the optima battery i have is considerably smaller than my factory one (85 4runner), so the battery hold down no longer functions properly. i have done a quick fix by placing about a 3/4 inch plywood square beneath the battery to make it fit. it kinda works untill i hit a bump. so i was wondering what yall did to yours. i was wondering should i just buy a rubber strap with hooks, or fab one out of metal( how thick should i use, can i bend 3/16 inch steel by hand in a vise possibly using some sort of vice grip for leverage) or did you modify the stock metal hold down. thanks in advance.