On Wed, 22 Feb 2017 10:59:57 -0600, dpb wrote:

On 02/22/2017 10:46 AM, dpb wrote:
...

Couldn't manage to get the new seats into the recesses; as the picture
of a kit linked to shows, the seats have a flair at the bottom and since
the seat housing is an inch or so below the top of the housing, and it's
only the diameter of the cartridge can't do more than stick one finger
down the hole, I could not get them to start...
...

https://www.ebarnett.com/Sku/133468?cid=SHOP_Barnett_ALL_C&CATARGETID=120259710 000121573&cadevice=c&gclid=CMyD46uSpNICFQKtaQodvkM DnQ

Will Step 6 here help you?

https://www.thespruce.com/delta-faucet-repair-2718845