I too have replaced my oem poppets with the universal one's. I have noticed that not all universal poppets are equal. I have some that are just hard to get the gas and beer Fittings to click in place. I've noticed there doesn't seem to be a standard. But I've never had one leak.
I just kegged 20 gal of Scottish Export. I had 22 gal in the fermenters so I could get each keg full of perfectly clean beer. I got the recipe from Homebrewtalk but I can't remember the exact thread. I tweeked it a bit but it was a great little drinking beer to begin with.