Are you guys using the supplied engine mount and screws? What the heck is a #29? That is the size they suggest for drilling into the mount. As far as I know I don't have a #29. A 5/32 bit looks like it would be the closest, but with my luck as soon as I use it, the hole will be too big and the bolts will strip. I usually like to use mounting bolts that go the entire way through the mount so I can put nuts on the end. The bolts that come with the kit are only 3/4 inch and they are self tapping.