I've done it both entirely of pre-made lines and entirely with home-fabbed lines. Going with pre-made lines was pretty darn simple, you just have to plan well (and buy a couple of the shortest lines for the inevitable "juuuuust too-short" moments). and I didn't even bother trying to perfectly follow the factory lines. heck, I didn't even completely remove them. Just be sure that it's all secured well. vibrations and rubbing are the enemy. the big reason I went with home-fab the second time was because I was installing a newer double booster and it made it easier to adapt old to new fittings.