mayday mayfly?

[MT204]

Just picked up a mayday mayfly mold and the Pike and Perch love it!
A couple questions that I thought I had figured out but maybe not.
Going through old posts for ideas and CTOM had some really nice mayday photos!
http://custombaits.com/index.php?topic=5959.0
What is the dent in one side for?
I thought it might be for where the collar on a jig might go but in the photo the dent is in what Tom explains to be the belly which would then be up?
Is there an up or down?
I would guess that one could take the dremel and remove it if not using collar type jigs.

[ctom]

The first picture in that link shows the bottom of the bait. That round spot is glow plastic I set in there and then finished the injection. I'm not at all sure what the small square divots are for but the mold is formatted to have them in there. A Dremel would erase them fairly easy.

These baits fish great on a plain Aberdeen hook in about a size 4. The hook's weight is enough to counter the buoyancy found in some soft plastics when fished on a line without a float. Sunfish will often hammer this bait fished this way. Drop shotting these guys on a plain hook is deadly to if crappies get it in their head to suspend. Not a lot of people talk about this little jewel but its a super bait and I've had days when cold water smallies tear them apart.

[Mike J]

I fish the side with the divot up myself, but I doubt it matters. This is a go to spring panfish bait for me. Without thinking too hard I can count 11 species of fish I've caught on that mayfly. It's fantastic for open water and ice.

[DF]

The Mayfly is an awesome bait, but not a cheap mold. You might have the skill but I would not go near it with a dremel, one slip could make an ugly mess. 

[andrewlamberson]

To me it looks like it makes the top look like the  wing pads on a mature insect.

[MT204]

To me it looks like it makes the top look like the  wing pads on a mature insect.

I think you have it.
I looked up some images and your on the right track.
Thanks everyone.