Transom mount is ok
Steve I think you're right. Arguing over forward or back is micro-managing. At any reasonable speed of movement 20-30 feet of warning is within human reaction time. No-one can stop a boat that fast. Now a forward looking sonar is a different story but we're not talking about those. Most of us learn about shallow water from the keel bang. However, setting the depth alarm is always a good idea, I use 10 feet and it keeps me out of trouble so far.Nothing wrong with a transom mount in my opinion. I mounted mine in the laz so there was no external wiring required. That's about it.Steve