Lectrons hands down have proven to me that they make more lowend power, and maintain the same topend power as mikunis or keihins at the very least. Seen it myself on the dyno, and I ran 32mm lectrons on my old sand bike. The hard part is, learning how to tune the needles, understanding how it works, and making sure you have all the needles your gonna need to get it tuned in. I recommend going with a set of carbs from a reknown lectron builder like packard, he can get you close. After that its just fine tuning to get them perfect.If you dont like the flat head screws on the carb top, then go to the hardware store and get different ones. All carbs come with shitty hardware that the head strips out on, so I dont know why someone was just bagging on the flat heads on the lectrons.