i believe this is the PP bearing, which is "similar" the porsche bearing, not the LN bearing. i would think calling PP might generate a little interest in getting it back for analysis, but maybe not. i've read a lot of posts lately from people using the PP instructions which do not indicate locking at TDC. jfp and jake have even mentioned in a previous post that this keeps tension on the shaft and can cause it to go off center.
http://986forum.com/forums/performance-technical-chat/35618-ims-install-help-ims-bearing-not-centered.html
maybe the above thread can help.