Doppelmayr did do some modifications to the Discovery and A51 lifts this year, namely, with regards to adding new lifting frames to the towers.
Here's Discovery from the Peru Express lift.
And take a close look at the towers on A51 to the right:
Excluding Argentine (as an auxiliary lift), this leaves the Ruby Express lift as the sole lift on the mountain to not have any Doppelmayr components.
In a related note, Keystone appears to have reduced the number of chairs on both the Peru Express (from 142 to 135) and the Montezuma Express (from 168 to 151), which I guess slightly reduces their uphill capacities from 2800 pph to roughly 2600 pph, as the chair spacing doesn't look too much larger on either of the lifts. Also, the original Doppelmayr number stickers on these two lifts have been replaced with new ones similar to the stickers put on the Outback Express, Wayback and the Santiago Express lift in 2011 (lift name above the number, Keystone logo below the number), which means chair #1 is now chair #01. Currently, only the Summit Express has chair number stickers with a Doppelmayr logo instead of the Keystone logo, but that's because they were put on in 2010 when a lot of the number stickers were peeling off.
This post has been edited by DonaldMReif: 07 January 2014 - 09:26 AM