two things must happen.
1 you have to set the ring spacer to 100 by removing the lenses and turning the ring under the lense till the 100 mark lines up to the referance marker for each lense, well the blue and red anyway but there is one for green that doesent seem to really change the angle of the lense but it doesent hurt to set it correctly. DONT MIX UP THE LENSE EITHER, there specfic to red and blue.
Secondly, you have to dissmount the entire lense block which isnt a bad idea any way to change the lense rings to the proper setting. Assuming you do that in the first place, before you put the block back in you have to loosen the red and blue tubes. There is a small triangle shim made out of solid aluminum at the top and bottom of the tube face right behind the face plate heat sink, you can see it before you even do anything. The problem is you need to change the 72" spacers to the 100" spacers. I dont know where you can get a set. I was lucky enough that my first 1031Q was set to 100" and I just put those spacers in my newer 1031Q that I retubed and sold the 72" spacers to TINMAN when he bough the 1031Q chasis I sold him.
The differance is that the 100" spaces are about 1/8th inch and the 72" spacers are almost 1/4" if I remember right. I have heard people using washers for the high side to create the proper tilt but you have to keep trying till the angle is correct and both red and blue must be the exact same.