BUILDING SIGHT TAPES
I have been building sight tapes for my 3d bow for years and in the beginning I made it way to complicated and tried to do them perfect in one attempt. That method leads to nothing but frustration and is simply the wrong way to approach the job.
So here is my current method:
You need to get TaPeS the archery program, it is a 15 dollar download for your computer and it allows you to make custom sight tapes with different colors and lines etc, it only uses two known distances such as 20 yards and 50 yards and you enter them into the program and it prints a tape.
Now go out and shoot with your bow and get to marks, such as 20 yards and then 60 yards on your sight, you can use a pencil or put down a piece of masking tape and then use a pen or pencil on it to get those two marks on the sight.
Now on the program print off the unit scale and cut it out with scissors and measure the distance between the two marks on your sight for 20 and 60 yards. You don't have to be perfect, just measure and get a number such as 43.4 and enter it into the program. Why, because now you are going to print off a sight tape and cut it out with scissors and lay it on your sight and see if it matches up with the two marks that you just measured, I guarantee you that it will not and now if it is a little short then just enter in 43.6 or 43.5 and print off another one and keep doing this for a few minutes until your sight tape matches up with the two marks. This step is vital that you simply change the decimal quickly and without over thinking it because if you try and measure perfectly and generate one that is perfect you are going to get frustrated quickly.
At this point you need to play with the program and learn how to deal with the columns and margins and stuff. I would turn off everything and only print one sight tape without trying to place it perfectly on the regular computer paper. Just print it anywhere and only one of them and then use scissors to cut it out. Now what is important is telling it to only make a mark every two yards, I am telling you that as a 3d guy you are better off with 2 yd increments rather than every yard. Then you can also pick your color for the tick marks and major marks. I use red on the 20 30 40 50 60 and black on the tick marks between. Don't worry about the length of the marks and leave them nice and long because you trim with scissors anyway and they get perfect with the cut. I don't like doing 100 because it is a longer number and leaves to much white paper, I use only 20 to 80 yds normally and I can then cut right next to the numbers and make it look and fit on the sight perfect.
Now, trim the sight tape nicely and pull out some scotch tape that is about a quarter inch longer than the sight tape on each end and put it on the sight and get your needle set on 20 yards. Keep in mind right now that you want to put the sight on either 20 or 60 yards one of the two known distances. Then you want to lay the sight tape so that the needle is more centrally located. I personally take the needle off the sight when laying the sight tape because getting it under the needle is a pain and causes problems. Just take it off, the sight is in the 20 yard position and stays there so once the tape is on the sight then you simply line up the needle with the 20 yd mark and you are good to go.
Now, Go out and start shooting at all of your distances especially 20 and 60 and over the next week or so you are going to see if the sight tape is actually the correct one. This one we just made is just the rough draft and now it is time to see how good it really is. I personally shoot asa scoring rings most of the time but I do also have a piece of cardboard on my target with a horizontal piece of black tape on it and I will shoot a couple arrows at the asa rings and try to pound a couple 12's but then I shoot one or two arrows at the black tape to see if my sight is dead on or not. After a week or so you will have made a couple more tapes that are shorter or longer and you will end up with a really freaking solid tape that you trust.