I purchased the 4″ LOC BBX for my L2 certification. I went back and forth on a few rockets and settled on this. It’s well built, uses familiar LOC methods, and heavy enough to avoid a very high altitude flight. I built the fin-can outside of the rocket, used the Z-clips for retention, and after some debate included the baffle. This allowed me to reach down to the shock cord mount.
I ordered a few extra couplers and coupler-stacked the booster section up to the baffle, and again over the baffle up to the payload coupler. Given the large tube volume I also included an e-bay with an apogee event in addition to the motor ejection charge.
The only change to the building process I made is around the canards. I installed a coupler behind the slots, cut through it where the Body Tube slots are for the canards, and then glued a LOC “Stiffy” inside. This allowed me to glue the canards to the Stiffy. I also went with a 72″ parachute, in part because the launch field is at 10,000 feet, and in part due to the extra weight.
The certification flight went great on a J180T! I now have it set up for dual deploy and am planning a flight on a K270 in the near future!