From Leonstar0 on the forums:
Hum, another thing.
When mana is fired from a mana blaster using a resistance focus at a tiny planet (block) after a few cycles it seems to be flung consistently to the north west in a straight line. (perhaps slightly norther?) Both X and Z were negative ( X -771 Y 65 Z -358 as an example) although I tried this from many different coordinates, and received identical or near identical results. (X and Z still negative)

I have not observed this behavior when using the tiny planet (baubles amulet), using the same lens. (separately, with no interference)
is the tiny planet having slightly different mechanics intentional?