this is on my list as have been asked before a few times and took me a while to get a bracket. I will incorporate side strengtheners so they don't warp and light blockers so all into the design - should be up in about a months time

I have finished the repro and will then do a light block and straightening fix as well as a modded version with everything in one. These will be straight and have no warping - will release soon.

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Here is the repro MPF opto and target button Channel as well as a spreader / light baffle. I am still yet to design a modded version with the baffles included in the channel bracket design so people don't have to get both items.

The parts can be found here:
https://www.shapeways.com/marketplace?q=swinkswho%3F&sort=newest

The MPF channel is a replica of the original which is laser sintered 3d printed so is solid nylon, and will be stable and highly unlikely to warp.
Who3 (resized).jpg

The Add-on is the spreader / light baffle. Simply line up to determine which 2 screws to temporarily remove from the opto boards and then insert the Spreader / Baffle and then re-install 2 of the screws again. This item will rectifier any warping by straightening your. The advantage with this design is you can still see into the channel to check things are working while removing the warp.
Who4 (resized).jpg

here is the 2 items and target buttons assembled to give you a better idea.
Who1 (resized).png
Who2 (resized).png

for anyone that needs or wants a MPF sensor & mushroom target bracket (replica or upgraded or insert) you can head here.

the upgraded version has the light baffles and spreaders built all into one.

https://www.shapeways.com/marketplace?q=swinkswho%3F&sort=newest

the first one pictured is red (just wanted it to stand out) but there is a selection of colours - unfortunately I have no control over the printing costs especially for the black

upgrade (resized).jpg