Just be aware that every line and each individual are different and that you really need to keep your eyes and hands on your puppy/dog to judge whether they are at a good weight and adjust accordingly.
Basenjis naturally gain most of their height by 6-8 months usually only gaining another inch or so after that. They tend to be slower to fill out sometimes taking 2-3 years to reach full maturity. The percentage of HD in the breed is just over 3% and in basenjis the most important risk factor is family inheritance. The best way to predict your puppy's risk is to have vertical pedigree data.