really nice. thank you for sharing all this. as soon as i find the time i will try it too. i have an unused pi waiting to be connected. btw: which post should I merit... 
Thanks 
Of course, all of them btw: a first question. i once had a core node running. but the pi was so slow and it wasent able to be up to date with the chain. do you have this problem too?
So you mean you have started to run a full node on the pi, let it download the whole chain and sync it afterwards? It takes week or so, because of the size of the blockchain and the realatively slow processor of the PI.Usually the solution is to run first a full node on a windows/linux PC (with a powerful processor) and let it download and sync the blockchain to an external USB connected HDD.
As soon as it has finished the sync (takes days, still) you can detach the HDD and attach it to the PI and voilá, the PI has to do nothing but continue to sync the daily changes which it can handle more easily.
If you have an older PI, with a slower processor, search for the model if it worths the effort to try to build it, because of the minimal speed requirements.