SmartCarb for KLX140

I am new to vitalmx and I wanted to ask for feedback from anyone who may have a SmartCarb, especially the KLX140.  I have a KLX with the BBR 170 big bore kit and I just ordered a 28 mm SmartCarb for it.  My bike also has the BBR performance cam, the BBR rev box and a Big Gun Exhaust.  It still has the oem 20 mm carb on it until the SC comes in.  Are you guys having good luck with your SC?  What size did you go with?   Thanks