Howard Teman - The Gunner that never was

In 2010 as noted on this very site, Steven said that the initial plan for a sixth member was to be a keyboardist/piano player named “Howard.”

I strongly believe that this indicates that Howard Teman was that man.

Howard Teman is a little known figure in GNR lore, but ironically he was the first person to play piano on a Guns N’ Roses record (not counting the synths on PC): The outro piano work on One in A Million is by Teman, in 1988.

He also would play piano on So Fine.

It’s my belief as such given Steven’s comments that there was a plan to bring Teman in as their sixth member, but Axl decided on Dizzy instead.

Wilco wrote:Howard Teman is a little known figure in GNR lore, but ironically he was the first person to play piano on a Guns N’ Roses record (not counting the synths on PC): The outro piano work on One in A Million is by Teman, in 1988.  

What's the source for this?

He's credited for percussion on Lies. And he doesn't say anything about piano here:

Interesting