maggots? MAGGOTS??
Don't worry, I trot for trout and grayling whenever the conditions call for it, nothing wrong with it

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I'm no expert by any means, but basically what you want as an average set up is about 4lb line, an appropriately sized stick float and a size 14 or 16 barbless hook. Use split shot to dot the float down until only the red tip is showing - there's usually a guideline on the side of the float, e.g. '6x4' would mean you need 6 no.4 shot to weight it down. Depending how fast or slow you want your bait to sink, you can either bunch all your shot together below the float, or as most people prefer to do, space the shot out for more even sinkage. As for depth, you want to be fishing either at the depth of the pool you are fishing, just on the bottom, or maybe an inch or so overdepth. You can measure the depth with a plummet - if the float goes under you're too shallow, and if it lies flat on the surface you're too deep.
Do this BEFORE you put any split shot on your line.
Once you've sorted that, chuck a handful of maggots into the desired spot, then flick in your line with 2 or 3 maggots on the end to follow the free offerings downstream. Loose feed little and often, chucking in a few maggots every other cast. When you're fishing the most important thing, as with the fly, is that it
must not drag. Keep mending the line,
don't let it drag, let line off your reel to keep the float drifting down in a straight line,
don't let it drag. If the float disappears, strike straight away - sometimes it's just the bottom, in which case allow the drift to continue. If you're constantly catching the bottom, try fishing an inch or two shallower.
At the end of the day the best thing to do is practice - as with anything, when you start getting it right, you'll get into the fish. Oh, and did i mention that the key to success if not letting it drag?
You probably know some of this as it is, but i hope it helps to some extent
Tight lines
Eric