however, in these days I decided to try the thinner versions, and bought a bag of 1.3 (still small triangle, smooth), and I didn't liked them on the mandolin: they are lighter in weight, the sound is thinner losing a lot of bass frequencies, and the too harsh on the high strings.

The re-beveling didn't do that much, added a bit more volume and gave a somewhat cooler tone with greater articulation. Since they already came with a speed bevel, I figured the gains would be incremental. the strumming is interesting, lightening the sound and making it play like a classic "bright acoustic guitar", but I don't like it for bluegrass chops. they also transfer less strength to the strings, so the overall volume is less and, in particular, they can't handle heavier dynamics, so if I dig a bit more on the strings, I can't get "more" volume. I did play around with them a bit to see what I could get. Rounded two of the three tips to give me a point, a rounded point, and a fully rounded edge. I also deepened the bevel to the full edge width on all points.

Oh no! Why did I get blocked?

I have three engraved small triangle TP 40's and love 'em! The 45/1.14 is nice too, the 50/1.25 starts to loose presence, but still nice.