Yes, it can be done! More about it here:
http://www.autopia.org/forum/machin...polisher-features-benefits-3.html#post1525660
Yes, it is "legal" to do so (it won't invalidate the warranty)!
To date, I have sold over (50) plates to guys using them on LHR21ES machines. Read about it here:
http://www.autopia.org/forum/machin...erformance-rupes-bigfoot-lhr15es-lhr21es.html
Yes, I have them in stock ($40.45 + $5 shipping via Priority Mail).
If you want one, e-mail me a request at
iamwaxman@aol.com , and I'll fire off a Paypal invoice your way.