Yeah ,the front ring slides in tube to act as a centering ring .the rear ring is larger so it is a thrust ring . Should fit in an aeropack it's same dimensions as 98mm motor thrustring.
I have another I need to put holes in for vent tubes a guy in my club wants to cluster 38 skyrippers going to vent through the bottom.. maybe do 2 Lokis , 2 skyrippers . I can add holes to it no problem.
I only made 3 but if there is interest I can make more .
I have received several request for these . Think I will make more . Send me a pm if you want one . So I have an idea of how much material to order. going to add a few changes like holes for igniter wires / hybrid vents and Thinking of getting them anodized.
Probably will not have any until after the first of the year . My weekends are booked with Christmas and birthday parties .