Super Megaforce Gold Ranger 2.0

I'm sure many PR fans may not have attempted this, but I replaced Robo Knight with Titanium Ranger in order to satisfy fans of the first American-made Power Ranger - yes I'm referring to the Titanium Ranger from Power Rangers Lightspeed Rescue.
Which leaves to mind one question - with this Silver Ranger as the 6th Ranger of the (Super) Megaforce team, would you rather Robo Knight be referred to as an "Extra Ranger" like Ninjor, Blue Senturion, Magna Defender, etc.? What do you think?

Super Megaforce Gold Ranger (c) Toei, Saban