Good to see you here again. I came across quite few running PI. We don't have organized documentation on that yet; people in slack would be help if you'd like to check over there: slack.m-core.org
Nice to hear from you too! I have just been staking on a windows laptop over the past year and it has been working well when I remember to setstakesplitthreshold 3200 and setstakecombinethreshold 1200. Any problems that I have had with coin input size management has been when my laptop resets and I forget to change them when I run the wallet again. Is it possible to set these in the conf file so they are set when the wallet starts?
I have 2 Orange PI PC plus with custom cases with a fan and heatsink and 1 Orange PI zero currently being shipped from China. I am looking forward to getting the wallet running on one of them for staking, because this will use much less power then the laptop and will be easier to keep on 24 hours/day. I am going to put android on another one to use for streaming TV. I plan to test to see if I can mine with that one while streaming at the same time, but it might take some process prioritization that I don't know how to do yet. It would be really cool to figure out how to make a PI cluster for mining and to share a guide with the community, as the hash/watt with the ARM64 chip seems to be higher then PC cpus.
The new wallet is running on my laptop and is waiting for the fork. It seems that there were only ~150 blocks since I went to bed so we might be waiting for a while.