Interchangeable Spools - fly fishing reels have the capability of changing fly lines, these can usually be by a bar stock or dye cast spool or a plastic cassette
As for colors and size, War Eagle Spinnerbaits all the way from 1/4 to 1/2 ounce are frequently tied on the end of my line and allows me to either burn the bait back to the boat or slow- roll it along the bottom, again, depending on the activity levels of the fish
Most high-end modern fish finders offer imaging and sonar
Mark devotes a lot of his time to helping raise money for and publicise the work of the Autism Awareness charity and he finds Charlie only too willing to get involved in one of the charity's open days "Fishin' with a Mission"
You will need a split ring, dropshot weight and an offset hook to use this lure effectively
Any day you see the fish crushing in the upper layers are best, but that doesn't mean you won't catch them in cooler conditions