Yeah, I definitely made some changes between 2018 and 2019. I have some video than needs editing describing those changes. I'm just slow at processing.
I went to short tether this year to keep the rappel line drier. Dealing with a 40' length of frozen rope is a PITA. I also changed to a distel hitch from the ascender for two reasons. First I didn't like the idea of having slack line hanging off a Ropeman (the Safeguard I wasn't so worried about but I needed to free it up to be available to attach to the rappel line) and the metal ascender made a metallic clank if my girth hitch link bumped it. That doesn't happen with the distel. I prefer to be able to quickly disengage the tether at the tree to go around branches so I want the link there.
I also added a screamer after taking
@kyler1945's posts earlier this year to heart. Falling three feet on a three foot section of rope would not feel good. The screamer should help slow the deceleration (and hence the shock load) if something does go awry. The screamer is a static 22kN, 48 inch runner that has been folded and sewn together (commercially purchased, NOT DIY) so that it is about 8 inches long. Under static load up to about 500lbs it just holds the weight. When the 500lbs weight limit is exceeded (under a falling load situation) the stitching starts to pull out and slows your rate of stopping reducing the fall force. I take the screamer out of the system once at height because the extra length forces my tether too high. It's not really needed in a static situation anyway, just when there's slack while climbing.