You asked for how the rest of us tension tubular locks, so...
Here are the tubular lock tensioners I use most often. Yes, have a couple of the specific tubular lock picks, but prefer using these hand-tools.
The first one is similar to the one you made.
It is used the same way as yours, except having two handles, you can apply more even tension to the lock. The reason for the pointed prong is to fit into the keyway and not interfere with the pins.
The other type I use a lot (and it fits easily into the smallest pick kit) is made from music wire.
Slide the angled part into the slots in the lock.
And turn it to apply tension.
Made the music wire tool to have two ends. One is the end you saw in the above pictures, and is used in tubular locks that have a groove in the center post. The other end is identical, except that the bent part is shorter, so it can be used in tubular locks without the groove in the center post.
The final tool, at the top, is not a tensioner - it is a straight pick used to manipulate the pins.
Gordon
Just when you think you've learned it all, that is when you find you haven't learned anything yet.