Last August, the Trico hatches and spinner falls were ridiculous. One of the best flies was Ed Engle’s Drowned Trico Spinner (prior post with a how-to video here). It features a segmented and thin body from wire, which helps somewhat with submerging it. All I know is the fly did very well last year.
His book, Tying Small Flies, is incredible, BTW.
Here is a shot of one of the flies.