First off, I want to say they look great! Somehow I hit a temperature wall around the same as you do.
I just picked up the jalapeño kit. Sounds like it could stand to add a bit more heat? Suggestions on quantity and ingredient? I was thinking of getting some more jalapeños and mincing them up and adding them. Maybe smoke them first? Habanero dust sounds great!
I just did a pepperoni stick kit by Hi Mountain and also a garlic and peppercorn summer sausage kit. Both were equally mild flavored. Don't get me wrong, what as faintly there was good, just not enough, know what I mean?
One more question, if you don't mind me asking in your thread: As per the reply of hitting the lower IT of 153* vs 160* for the sake of rendering, would that have anything to do with the shriveled cases? I too have suffered from shriveled cases on one of my batches. I was thinking I wasn't stuffing enough. What are some possible risks of not reaching a higher IT? I made mine out of white tail venison.
Now that you have made your kit, is there anything that you would have done differently? Sounds like you would add more Douglah? How much?
If I am stomping on your thread, let me know, I'll edit out the questions.