The custom made solenoids are now available to order! So now everything is open to order - USB-C controllers (Model F, beam spring non-displaywriter, beam spring displaywriter), solenoid drivers, and solenoids.
For those not aware, a solenoid contains a metal cylinder that vibrates the keyboard and/or makes a noise every time you press a key (with exception for certain key programming like the Windows GUI key, etc.) and helps add even more clickiness to a keyboard.
These solenoids are also a great option as an upgrade to IBM's original solenoids too (I'd always save the originals of course for the sake of completeness).
https://www.modelfkeyboards.com/product/xwhatsit-beam-spring-or-model-f-controller/Why pick this solenoid over other solenoids or over IBM's original solenoids?
The new solenoids are far beefier than IBM's originals, so your solenoid clicking will be even better! It's a custom design that you can only order here. The specifications are 6v, 40 ohm, 0.15A, 0.9W, adjustable throw factory set to 1mm but with a user-adjustable range of about 0.5mm to 5mm (there are 2 screws that can be loosened to adjust the distance of the strike bar). The factory throw setting allows you to start using this solenoid with no modification (still need to follow xwhatsit's solenoid installation guide to avoid damage to equipment).
This solenoid has the dark blue outer covering, black and white twisted wires and 2.54mm connector like the original IBM solenoids, but with a strike bar so it won't exactly resemble the IBM solenoid.
This solenoid is not the one that's available on eBay, though it looks similar and the voltage and resistance specs are the same. Also that other model doesn't have the adjustable throw - you would have to spend time milling the strike bar to modify it for correct usage with the solenoid drivers. If the ebay solenoid's throw distance isn't changed, your solenoid will be very sluggish and won't be able to operate at full typing speed. Also my solenoid is even larger than the eBay solenoid, the 26mm height dimension on eBay is set to be ~29-30mm on my solenoid (the solenoid goes sideways in F62/F77 so it fits) though all the solenoid specs are subject to change. With a larger metal frame, my solenoid should be a little louder than the eBay model and far louder than the original IBM! This is the largest possible solenoid that will fit inside the classic style F62 and F77 cases.
These solenoids will be in the second container ship, expected to leave China soon, so they are not in stock just yet. Will post photos as soon as production finishes.