Marina here from Club de Reparadores in Buenos Aires. We also fix all sorts of items at our events, (always electric appliances and textiles, but often also books, toys, music instruments, bikes, electronics, 3d printing of spare parts). We always try to weight every item to keep track of our impact.
We have an old kitchen scale for small items, and one with a hook (not sure how this is called) for bigger items over 2kg, though it is not so precise.
We still have quite an issue with how to register the info, I am not sure we’ve figured out the best way yet! We started writing this down on a notebook, which required lots of data-entry hours post event… We then tried to register items directly on a spreadsheet with a computer at the events, but this was often a bit problematic, not always there is a computer available for this, and it also feels a bit burocratic! Now we are back to doing it the Restart way using a big poster sheet where things are listed in order. We feel this is what works best as it also contributes to the dynamics of the event as people can see how many items have arrived, in which order, how many have smiles or sad faces…
But I have to say we are always behind with entering this data to a spreadsheet to actually calculate impact! We have to catch up strongly on that task!