These are the parts to convert my previous Hextraction Iris Tile into a secret variant, and to make decoy non-iris secret tiles that look like the iris from the outside.
To make a secret iris you need the non-lid parts from the original, the secret iris lid, and a secret iris cap. Variant caps are included for both the Zack design with an inset circle, and an inset questionmark, because the actual iris has shallower peg holes to attach the cap, and a nipple on the inside of it to that if the iris is open balls are guaranteed to fall in it.
If you need to glue the lid parts together you may wish to do that before attaching the base to ensure it doesn't seep through and gum up the mechanism.
To make fake secret iris tiles you will need the lid from whichever variant matches the rest of your secret tiles. If you don't have any secret tiles already, they can all be fake iris tiles, if you do, throw in a few fake secret iris tiles just to throw people off so they're questioning more than 'is the iris open or closed'. Do not use the iris lid cap on non-iris secret tiles; the nipple will block the centre.
Also included is a boolean subtract stamp so you can easily convert any not-included secret tile into a fake iris secret tile, and the lid nipple so you can use whichever other variant of the lid and still get the guaranteed pit effect.