switchin the spokes over wont work as they wont be the right lengths, building wheel is easy if your patient, when building a brand new rim after its been laced and its true you jus tighten them all evenly slowly going round the wheel over and over one turn at a time and it wil turn out fine. then tension it just ride on it for a day and tighten them back up and itll be fine, it is abit weird have a few practisdes first but when youve got the hang and the patience its easy