I don't care what anybody says, tubes make a difference.

After going through 3 more tubes in 2 months, I finally got my Continental
Race Lite Tubes (75g) and mounted my Continental Grand Prix 4000s Tires.
No more flats after the tire swap. Tubes are just as filled as they were
4 days ago (where as LBS replacement tube was flat at end of 1st day).
My advice to those newbier than me, spend good money on tires and tubes.
1 good tube is less expensive than replacing 4 cheap tubes.

Shaved 130g from OEM set (Maxxis tires were at 230g VS Contis at 205g & OEM tubes were at 117g VS 75g).