All VoltShelf kits are now being shipped with the parts and instructions to allow you to install them using your choice of the original installation or the new no-drill installation. The no drill is slightly easier to install, but takes a little more time to take it down and put it back up. It was developed especially for leased cars some of whose owners are understandably reluctant to use the original installation. The no-drill installation was recently updated to make it even easier to install, One person can do the installation in just 5 minutes. The original installation will only take about 15 minutes, but it does let you take the VoltShelf down and put it back up in about 5 seconds. Our recommendation is that if your aren't sure which is best for you, start with the no-drill installation. If you find that you are taking the VS down frequently, you can always convert to the original installation at any time. It only takes about 10 minutes.