Aluminium Section End Caps

After ripping my kecks in the Test Lab last week, I thought it high time I did a end cap for the 40mm Aluminium Beam to prevent me ripping them again on the end section.
TWEEK NEEDED - I've done a size for size on inner dimensions, and need to grow the internals by 1mm for this to fit. Not too bad except I printed two of these off already(!).
Snug Fit.
This is 1st February Upload.
All the best,
Eur Ing Andy Southern