Lectron Fuel Systems in Texas is the new manufacturer of Lectrons. Dennis Packard makes his own alky needles hence the PE1,PE3,PE7 needles. Gas needles typically range in 5-2 to 6-2 on zillas. An alky needle would be around the 17,18,19 range. Or get a Packard needle. Need to make sure they are set up for a pump or gravity and if they are standard or HV (High Velocity) carb. The standard lectron has a 2mm taper. An HV has a 4mm taper. So a 48HV actually measures 44mm at the slide.