http://www.vatsaas.org/rtv/construction/finjig.aspx This is how I align my fins. Works great and I get straight flights. Used on 2" to 5.5" body tube so far. Easy, cheap and accurate. Locks the fins in. kwc -------Original Message------- From: Lesnick, Mike Date: 12/20/2011 4:19:52 PM To: roc-chat@xxxxxxxxxxxxx Subject: [roc-chat] Fin Jig for Large Daimeter Airframes - 5.5 inch diameter or larger Does anyone have thought and advice on use of fin jigs (to hold fins straight while under construction) for larger airframes (over 5inches in diameter)? · Can you buy them if so what sources? · Other options? · Necessary & How Valuable? Thanks Mike Michael Lesnick Axiom Healthcare Group 18135 Santa Lauretta Cir Fountain Valley, CA 92708 714-594-5720 - Office Phone 714-323-5968 - Cell 714-968-7076 - Fax MikeL@xxxxxxxxxxx