RE: Engine Mount: Bolts or Screws?
I use [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXD979&P=0]socket head sheet metal screws [/link] with washers into fiber filled mounts. Works great, just drill a pilot hole the size of the minor diameter of the screw thread. Used it up through a Saito 100 with no trouble.
Stan