|The first page of the Zeta plans (Click to enlarge).|
The Zeta is a fairly straight forward build - with the exception of the ring that fits into the fin slots. You have to be pretty exacting in cutting out the fins for this BT-70 sized ring to fit properly, so I resorted to making them using the Cricut Maker. Even with this, the ring was a bit too small, so I had to slice it and add about a 1/4" wide strip for it to slide into the slots. 1/4" sounds like a lot, but this translates to about a 0.04" (1/25") error in the slot distance from the body tube. Not much at all, and a slight import error in the sizing could easily account for it.
|Zeta fin ring showing the added 1/4" strip (Click to enlarge)|
|Zeta forward section showing the flat space at the end|
of the BT-55 9Click to enlarge).
|Same thing, with the cardstock shroud added (Click|
|The Zeta ready for finishing (Click to enlarge).|