[Ansteorra-missile] Type of Siloflex APD

[Mike]

After reviewing Tessa's web site:

http://www.combat-archery.com. 

concerning the 3 different types of Siloflex APD's - External Tab, 
Internal Tab and Routed Channel. Would like to know the advantages and 
disadvantages of each type of design in the following areas:

Ease of building -
  1. Angle cut on front and straight cut on back
   2 Straight cut on both ends
Attaching to the shaft -
Flight

Michael Kettering