Hi guys. I saw a full mech mod for 75% off and I thought of purchasing it as a back up. It's a 26650 tube mod. I was just wondering--how does a single 26650 perform compared with a single 18650 mod? Are there more risks with the 26650 when going into the sub ohm range? Hoping to get answers asap 'cause the sale might not be for long! Thanks in advance.