'F SSK' style compatible with IBM chassis?

[micrex22]

Sorry if this has been asked elsewhere, I couldn't find it:
https://www.modelfkeyboards.com/product ... -keyboard/

For the FSSK style assemblies, are they compatible with original IBM chassis?

[micrex22]

To answer my own question, it does not look to be the case (pun not intended). Unless someone else already created a mod. But the assemblies look much thicker.