I bought a TWSBI 580AL 'Diamond' several years ago and liked it very much except for the threads next to the section on the exterior of the clear body. Due to the way I held the 580AL, the threads felt sharp and uncomfortable against the inside of my middle finger. As a result, I haven't purchased another 580 model.

I do have several TWSBI Eco models and enjoy writing with them very much.

So my question is, over the last few years, has TWSBI modified the threads on the 580AL body to make them a bit more comfortable for folks like me?

(Note: on the 580AL I bought, I used sandpaper to smooth the edges of the threads, with some moderate success.)

Thanks!