Retracts in general tend to be a source of numerous headaches.

Personally, I like the looks and performance of the Habu without the gear (less drag and weight) however if you have a nice smooth runway and would rather use it than handlaunch the plane I recommend using the stock gear and maybe installing retracts later. Note this will require a lot of modifications and overall performance wont' be as good as without any gear due to weight.

It is a simple quick change to go back and forth to stock gear or without. That's one nice feature in all parkzone planes.