After you get done trying and experimenting you will settle into certain go to kits. These will be ones that sell well and look good and not all the gimmicks. It is ok to try new kits but it is so cheap to order the bushing and a couple extra sets of tubes to go with them and then decide if you like the kit for future projects. Just label or mark your tubes and bushings for each kit so that you can identify latter. Have fun.