I have never heard of that, only replace the suspension links ("dog bones") to lower it.
Let the front forks up as far as you can until the tubes meet the handlebars, if you have not already done that. Usually that will give you a couple of centimeters at the seat. Then there is the cutting into the seat foam option which is easy to do. Probably all things you already know about....
Nigel in NZ
The mouth of a perfectly contented man is filled with .
-- 2200 BC Egyptian inscription