At first it isn’t too bothering to just tap E and clicking on the Zsphere and drag the mouse around/randomly to resize the Zsphere itself, but now I’m a little tired to do this randomly and I want to ask a couple of questions about resizing Zspheres with a little more “precision”:
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Is there a key to scale the selected Zsphere (like +/- Pag Up/Page Down) without the need of dragging the mouse all along my desk (and sometimes even outside the same mousepad)?
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Related to the previous question, is there is none by default, can we map and keybind these actions to the keyboard? (I prowled around Preferences a lot but I seem unable to find a keymapper or option to redefine macros)
You now, right-drag to make the Zsphere big, left to make it to shrink, but this only works following the equator of the Zsphere, and sometimes even randomly making the Zsphere big when reaching certain point crawling along the left side then shrinking it again randomly and never reaching the “exact” size you are aiming for (not even by double tapping - in fact, when I make an already tiny Zsphere and I try to make it bigger, when I double tap it because I reached the normal boundaries of my mousepad/desk, the Zsphere grows so so slowly that forces countless taps on it, making it to grow slower and slower, and never reaching the proper big size you are aiming for).
Also, sometimes the Zsphere re-scales so quickly with a small movement of the mouse that makes it impossible to give it that desired small size for a chain and such (I even zoom in until the pixels bleed to make it to shrink slowly but it never worked). Other times, when the same Zsphere equator is rotated some grads it never follows the “right/left” resizing path, making you to do this following a “diagonal” which sometimes is awful to track with the mouse, and in the end the Zsphere never re-scales appreciably. This also happens if the model is rotated, and would be more appreciated if the normal re-scaling path is preserved instead of rotate along with the model 
Hope someone can give me some tips about this, because, I do prefer to tap or hold + or - to shrink and beef up Zspheres rather than polishing my desk with the mouse every time I want something really big and something really small, but not extremely small! Thanks for reading 
(and also, hope Zspheres 2 has more control than its predecessor already stumbled on the “model shrinkage and crash” bug - Zspheres are a great tool with big potential! and almost an art on itself 
)