I've been following the Battery Mod thread for months and I'm planning on doing it to my I1V2 ASAP. Has anyone flown the Battery Mod up at 8,000' and higher using the 1360T High Altitude Props? I only get a little over 9 minutes before critical Battery Warning and automatic RTH from my TB47 Batteries and a little more than 12 minutes from my TB48 Batteries flying up at 8,000'+ where I live most of the year. I barely made it back this morning and had to cancel the automatic RTH and land where it was.