WK - that works great for flexibility. However that ply ring is not free weight - fine for tail heavy builds, not so fine for nose heavy builds. The buys at SIG send their decent mounts that can be used for any number engines. Engine-specific mounts work better like others have stated. I use Hayes mounts - similar to DB mounts in that they are one piece - different from DB in that the hole mount pattern is "rectangular".

About DB mounts - do multiple sizes (within reason) share the same bolt hole pattern?<br type="_moz"/>