Or do I need to use RCEXL's trigger device? I have Panasonic 6852 Hall devices and timer caps machined to suit, and would rather not have to re-machine things to accommodate a different device. This is for my riffed Upshur Twins. I am making six Twins and have gotten two finished to the stage of running using a pair of S&S CDI modules, but supplying 12 S&S modules (or even six twin-cylinder waste-spark units @$85 each) starts to get kind of rich, considering that the sparkplugs are $25 each in addition. The RCEXL units are more like $60 each.