JP1 Remotes

But on the download page here (for the pre-made ReplayTV files) for the DTT901 the text says to use 2900. However, I didn't see a 2900 code on the ReplayTV list after performing the upgrade.

The DTT901 is a Set Top Digital TV (ATSC => NTSC) converter box branded under the Zenith and ...

Keep in mind that the 6820 is a JP1.2 remote, so you would need a different cable to program it using JP1 than the URC-6131. Therefore, if you don't have a JP1 cable yet, you might want to wait for them to send you the replacement remotes before you buy one.
Chuckle; I was wondering about that. I ...

Here's their thinking. ... They figure that there will only be a small % of people that send them in for upgrades.

That makes sense. And I don't know what I was thinking, really, if I understand you correctly. They used to return modded-for-JP1 URC-6131's to customers sending in unmodded 6131's ...

When you send a non-modded remote like the 6131 into OFA, they discard it and give you a new remote that was modded at the factory. However, since the old-style 6131 has been discontinued for quite a while, they no longer give the old-style remote in return. They used to give the new-style 6131n ...

Rob, I have somewhere in the range of 15 of the original, unmodded URC-6131 remotes in-use across 3 households, and with the purchase of the Roku Netflix Player I've finally stumbled across a device that will require either an upgrade of the remotes (via OFA) or going the JP1 route.

I have an email ...