Finally, got my T2 back. A puzzling upgrade. The Electronics were upgraded. The battery compartment was upgraded, but they re-used my old battery compartment cover. The old shaft was sent back, and the old coil was replaced. I would have preferred the old coil as the cable was longer on the old one. I have no concerns about the mixed components. My T2 is back under warranty for 3 years so if any parts fail, First Texas can replace it at that time.
The accessory coil is ridiculously huge. I'm not a small guy and used to swing a Garrett Sea Hunter MKII, which was akin to swinging a cinder-block on a stick, but the T2 with the 15" coil is heavy. It goes deep, but after a small grid search, I couldn't wait to put the stock coil back on. First Texas always prided themselves on having the perfectly balanced machine, but the 15" seems as if it was developed by a third party that has no concerns for the well-earned reputation.