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As far as fishing the fly, it is one I use in the northeast on the Mitta and surrounding streams, mainly in smaller sizes, it is good fished in the riffles and in the bubble lines in pools under the willows the fluoro dot is a sight aid on the dull days and also when it is in the riffles. 

I have generally found that the fish just seem to sip it down and are in no particular hurry, it can be especially good when the big Christmas beetles are around, you can then substitute the fluro dot for some shellback which comes in just the right colour for imitating the iridescent colour on the wing case of those big beetles.

Tying Instructions:

Step 1.	Attach thread at point "A" wind the thread to the bend of the hook and back to starting point a couple of times, finishing at the bend of the hook. Apply a drop of superglue gel to the bed of thread and spread it with a dubbing needle. Then tie in a 1/2" x 1/4" section of the foam.
Step 2.	Now apply the dubbing to the thread, and wind on forming a very fat cigar shape body. Pull the foam over and tie off, ensure you keep tension on the foam as you tie it in, and do not snip off the tag end.
Step 3.	After tying in the foam take the thread to the front of the tag end. Now apply a small amount of dubbing to the thread again, and wind on to form a small ball., once that is done again pull the foam over and tie off as for the wing case. Now snip away any excess foam, form a small head and whip finish. The strike indicator or visibility aid is just a small dot of fluoro craft paint applied to either the wing case or thorax. Which one is entirely the users choice.