This power pod fits into the Mars Lander designed by mech-G. I flew the original design, but had issues with heat affecting the PLA of the power pod. Over time, even PETG will be affected by the heat. So I constructed a composite power pod from paper tubes and PETG printed parts.
The first print with a new power pod, flew successfully 5 times. The rocket finally was broken in a hanger accident. We are currently rebuilding a new model, using more defined construction and better materials.
The four parts for the power pod parts should be printed from PETG. Also required are:

1. BT-60 paper tube 3.8 inches (97.3mm) long
2. BT-50 paper tube 2.75 inches (69.65mm) long
3. A D motor clip
4. Cellophane (clear) tape to hold the clip onto the motor tube Cutting aids for the two tubes is also included, but optional. These take some learning to use, but a sharp razor and some experience will give you straight clean edges. Two hints: first, lightly sand the edges after the cut with a flat sandpaper to give clean cuts. Second, cut from the inside to the outside gives a cleaner cut. The top of the Motor Mount Top sits 1.35 inches (34.35mm) below the top of the BT-60 tube.
   Do not install the launch rod guide until after inserting the power pod into the Ascent Stage. Once locked in and a rod run through the Ascent stage, the required location of the Launch Rod Guide can be seen.
   I have not found the ejection baffle to be required, but a generous amount of parachute wadding is certainly needed to prevent burning.