@louis-kerckhove I’m sorry to hear about your dad, hope he improves soon.  I use this medium jumbo fret wire. It’s out of stock on this website but you can use the dimensions to find an alternative. https://tonetechluthiersupplies.co.uk/fret-wire-jescar-fw55090-evo-gold.html Like @darrenking has said,…   Read more»