I did not realise the double triggering when using 2box module. it was only when I connected 2box to laptop using Cubase and addictive drums and the double triggering was really bad on my snare. I cranked up tension on snare but did not help.. I followed advice about adjusting setting on 2box module.. set threshold to 40.. gain = 0.. curve = normal... works a treat.. no more double triggering.. Happy days