My son is now using the Medtronic CGM System with Revel Pump and My Sentry. Does anyone have a promblem with the signal to the monitor? Also I am thinking I soooooooooooo need another training on this pump! His finger prick meter says one thing the Pump Graph says another. We calibrate and it seems the two are still way off! I went so far to compare I used his one touch ping pump it stated 323 the medtronic meter stated 253 and pump stated like 134 with a low predictor? Any reasoning? I need help understanding all this.