Murray: The way Larry apparently did his test is typical of many. I have talked to Larry and highly respect him and his opinions; however, on this style of testing, I must respectfully offer some criticism.

When we do the testing on an Apple Ultra Tuning Machine, we pull from the absolute center of the axles. This is done so as to establish a datum that can/will be the exact same test method no matter what the design of the riser.

There is a lot more set-up to getting the bow positioned properly for the nock travel test. It is done with precision so that the results can be compared using the same set of standards. If you pull a recurve bow from the center, you will get straight and level nock travel. If you pull a crossbow from the center, the same results. If you pull a two cam bow of any design cams from the center, ditto. If you pull a single cam (except for one particular design), the results will be quite different. Not only will it vary in both the level and straight modes; but, it will vary extensively from one manufacturer to another.

My criticism of anyone who pulls from the nock position is that they have no "datum". The nock position, if they use a bow square, will vary from bow to bow. It also becomes somewhat of an assumption as to specifically where that nock position must be.

Good work on your friend's MQ1. I have corrected many times this same problem with customer's bows. BTW, the timing issue can also affect the centershot positioning when a marginally spined arrow is being used.