I have now replaced the five mssing rear spokes of my 2005 Brompton. But I find it hard to true my rear Brompton wheel. It is a struggle.

How much wobble (in inches or mm's) is acceptable, without too much risk of breaking spokes with heavy luggage? I want to load my Brompton with 340 pounds maximum, including my body weight and luggage. How much wobble is acceptable in the direction of the spoke length, and in the direction of the axle?