Migrate HW GTM 2600

Hi,

I need to migrate 2 cluster Active/Passive frrom serie i to serie r. They are LTM (active standby) and GTM-DNS.

I was thinking about adding two new members to the cluster and temporarily expanding it to a 6-node cluster. Then, on the day of the intervention, we could bring them online and remove two of the i-series nodes. To do this i have to ask for new SELF-IPS, new cables.....etc

Anyone knows the best procedure to replacement these GTM/LTM nodes?