I have some R500s, firmware is 200.7, and two R610s firmware is 200.7 too.
Any possible to do that:
1. I prefer to set two R610s as unleashed master, r610-1 for master , r610-2 for master backup. when r610-1 failed, the r610-2 will take over the master role.
2. R500 as unleashed member
3. The max number of R500s will overcome the 25 limit