I didn't think it was that hard. Just once I put them all on backwards, funny, it fit perfectly. Offset is mostly determined by spoke size. Mine had no offset to speak of, drum brakes. I understand the disk brakes have 4 different styles of spokes because there is a big offset and one side spokes are a different length than the other. Mine only had 2 styles, inside the drum and outside the drum necks. I may have this wrong, but I remember there were 2 different spokes for my rims. The tiny bit of offset on mine was adjusted by loosening one side and tightening the other side, but I was only moving the rims 1-2mm after initial assembly. Everything Mike at Walridge sent me worked perfectly, I did have to bend the necks on some to get them not to bend when installing. Even after the initial tightening of the spokes, the rims were well within 1/4" roundness and runout. It didn't take much to get them within 1/2mm. You don't even need a dial gauge, but I guess it would help, I used one but then stopped using it, you can see where they are out with just a pointer. After lacing you can do everything you need on the bike, but a guy I know loaned me his wheel stand, so it made it easy to stand up and do it on the bench, but I did a final trim on the bike.
Dave
69S