Is it worth using rollers in a slingshot crossbow design? Do you get more power, or does it only add complexity?<br><br><img src="http://i49.tinypic.com/243fg4p.png" border="0" alt=""><br><br>I was wondering if number 1 or 2 is the better choice for this. Number 2 if stretched correctly will stop the rubber band at the end which would (in my eyes) be a advantage to ease if loading and consistency, but will the rubber band hit itself? Or should I drop this idea and use a standard slingshot type setup? I am mainly interested in this design so that I dont have to mess around with standard methods of attachment(I am not good with tying knots).<br><br><br>And lastly what draw length would you recommend( how long rubber bands would I need for that? and where can I buy Terabands for not too much money?)? i thought about using marbles and 15 mm steel ball bearings.<br><br><br><br><br>PS: I apologize if I ask too much and/or come off as unknowledgable on this subject.