I recently wrote in reference to coil information. In making my own playfield from this Amigo design, I have had to make many adjustments as I do not have any reference material other than photos . One particular area I can not figure out is the spacing between the slingshot and the passive bumper that allows the pinball to enter the ball return and back to the flippers. I have enlarged photos and calculated the spacing to be 2 inches between the two points leading into the two return lanes. Everything else seems to function properly with the exception of this area. If you could provide some guidance as to the correct spacing or recommended spacing so the game is playable but not to easy or hard. Thanks in advance.