Glad this worked out for you and I’ll be curious to hear if it is waterproof when you get a chance to try it out. Looking at the photos it looks like it fits the seat with the sheepskin (and maybe the Airhawk cushion?) with plenty of cover so it’s not too tight. The H-D one is pretty tight and won’t tuck around the front seat sides very well.
Speaking of the Airhawk pad, I used mine for the first time this weekend and couldn’t believe how much better I felt after riding 380 miles on Friday. Usually my butt gets sore by the end of this ride, but this year there was NO numbness, NO sore butt, or any of the usual symptoms. I was very happy with how it worked under the sheepskin, which holds it in place and is pretty invisible to anyone walking by that might be inclined to grab it.
Really enjoying this thread and watching you fix up the new Triglide!