Renew SSL client cert without causing outage to VS

Its my understanding that as long as you did the original CSR from the LTM, that you can just use the renew button to create a new CSR, submit it, and then import the new cert. I don't think this causes an outage, maybe a momentary interruption as the VS is updated. I've been going thru the pain of renewing certs that were first installed via PEM files from CSRs that were generated on other web servers. Simply renewing on the F5 isn't an option in that case because the keys don't match.