didn't mention a cost„ I voiced some concern about range. 7 Aux tanks gives the hang time of 12.1 Hours,. Total fuel would 68,890Ibs., Attached is SB Service Bulletin upgrades., Sent from my iPhone Begin forwarded message: From: Brian Hazen < Date: August 11, 2017 at 3:04:12 PM PDT To: Larry Visoski Cc: Rober