Cabelas Innerflow Rods are excellent but original rear cap is slimpsy and can be easy lost during first fishing journey. I made a sturdy substitution with a spruce decor. I left no tolerance for inner hole diameter so depends of your printer you may have to adapt it with some instrument. I personally use Dremel tool with sanding accessory to cut about 0.5 mm of top 5 sm for snug fit. Do not hesitate to ask me to replace decor with your suggestions!

NB: Outer dimensions are 36 X 36 X 62 (mm); hole top diameter is 26 mm and bottom diameter is slightly less.