Prior to building my first set of wheels I had only replaced rims on 3 wheels that were already built.
Used the "tape new rim to old, transfer spokes over and then true method", the all subsequently, to my surprise, survived to spin again.
Then decided to build a set of Hope-hubbed disc wheels for my full-suspension bike. I had an empty house in which to swear as much as I required as my wife and girls were far enough away to be out of earshot, in New Orleans. Wheels are still fine, years later. Would like to build another pair as I've rims and hubs in hut but I'm no paying for their flights oot the country to get the freedom to swear in the volume that happens when I'm frustrated.
gmac, as I'm no expert on wheels this could be complete bollocks
, but 3mm on the diameter would mean 1.5mm on a spoke so possibly OK. Read somewhere about spokes coming in 2mm increments in length so unless the spokes were already on long side they might be OK.