That’s a good point, being able to see the tip.
If you want different angles then your invention should work well. If you have a angle cube you can also keep track of the base angle.
I have the angle cube, but it’s all about the view, I felt like I was sliding off the end of the knife without enough control.
The tip is the area that needs the most concentration.
I just need to make the tilt easily adjustable.
I’m not using the angle dimples as these force you to use the micro-adjust.
The only reason I can see why someone would use the dimples and micro is if the L-brackets slip.
Of course you need an angle guage or clinometer app.
With two screws against the flat crossbar I get a solid grip.
Using a decent tool to tighten them helps also.