Sorry about starting a new thread for this but it's kind of a different question regarding sink tip lines. I found this chart on line and what I find interesting is the "effective fishing depth" column. Fly Line Effective Fishing Depth Sink Rate In-Touch Deep 3 3ft 7ft (.9m 2.1m) 3 4ips (8 10 cm/s) In-Touch Deep 5 5ft 10ft (1.5m 3m) 5 6ips (10 13 cm/s) In-Touch Deep 6 8ft 15ft (2.4m 4.6m) 6 7ips (15 18 cm/s) In-Touch Deep 7 15ft 30ft (4.6m 9.2m) 7 8ips (18 23 cm/s) So according to this I need a Deep7 to fish below 15'. Is this correct??