[NTLK] Keyboard keys: quieter?

My first computer was a Tandy Model 100. Back then some of us pried off
the keys, and placed a small dental appliance/braces rubber on each
key's post, then replaced the key. It made for a much quieter keyboard.
Has anyone tried that on the Newton keyboard?
I haven't tried to pry a key off--thought I'd ask before I perform surgery.
thanks.

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