That's a good looking plane Mr Cox..! [:-]
Here is the NVA pressed into a seperate hunk of aluminum that is held by 2 screws to the firewall.
The Venturi took almost 2 hours to make with that oval shaped section that inserts into the crankcase....so I'll be happy to make these for about $80 each............
The plane is based on a Mike Pratt design called The Force...but scaled way down and with a built up fuselage instead of a profile. It will be flown on 50 foot lines....I hope successfully.