Right now, in a SoSebow, it's really imba-strong. Same in a Swallowbow. And I am pretty sure I can find a lot of decks that will just abuse it with Quantum Towers.
I see the idea and what you want to achieve, but quanta manipulation cards are easily abused and so, verrrrry hard to balance. Make it lose quanta *at least* so the trader gains his commission.
5:3 | 4:3 may be a lot better. And I would still add 2/3 of them in most of my Bows.