On a recent tour I had a problem with the distributor. Rather than trying to figure out the problem on the road it was quicker to just swap out the distributor. I borrowed a spare distributor from someone in the tour group. Since it was not set to the correct timing for my car I had to adjust it. Before I took out the bad distributor I used the timing pin to get the engine at TDC for cylinder #1. I noted the position of the rotor. When I put in the replacement distributor I set the rotor to the same position. Easy-peasy. Below is a picture of rotor position at TDC. You do not need any fancy tool just align the rotor to the position shown in the picture.
Bob Johnson