Only 5-6in long.
Made with scrap MM tube, CR's & Bondo.
Glue up a y-harness to MM tube.
Glue on 2 coupler to 29mm CR's, for 38mm coupler to Motor mount tube.
Insert MM assembly into 38mm coupler/glue.
Glue on an outer thrust ring goes over 38mm coupler....leave an inch of motor mount sticking out back.
Old credit card & Bondo to shape tailcone between thrust ring and MM tube.
Held in place by rear rail button [or plain screw] & you have a recovery gear attach point AND it looks GOOD.
TO use....
run shock cord out back of fincan & attach to Y-harness......
insert motor & wrap a few turns of tape at front so motor can't kick out back.
Insert motor & adapter into BH38 airframe and insert rear rail button to hold in place....Done.
That's a 3grain CTI case.