every routerboard is upgradable to 5.8 http://www.mikrotik.com/download.html I would like to ask if the RB153 is upgradable to v6.x (preferably to 6.11 ). Or is it limited to and supported up to v5.26? The download page says "RB111, RB112, RB133C, RB150 devices are not supported in v6, please ...