Thanks. That helps. I already added The Improved Grapple (level 4 instead of 3), and I decided not to give Improved Grab (I made some changes to coiling tentacle so it no longer suffers a penalty at level 10).
Added the Advanced form (with a few changes like name and level), as well as an augment for puppets as mentioned (well I said it would be for lure traps but figured it would fit better on the puppet). Also added the shifting shape ability and a feat to upgrade it.
Will try getting around to the rest this weekend.