Why don't you use computerised equipment?
It's important to remember that it's not the fitting computer or software that fits the bike correctly — they are just tools. For example, a computer may be able to produce the leg angle a person has at the bottom of the stroke, but it will not say what to do with that information. It still requires an experienced fitter to make the right choices and adjustments for the person in front of them at the time.
Our bike fitting service is based on skill and experience, and we do not require such tools. The benefit to our customers is that we don't have the high costs associated with these fitting systems to pass on, and therefore offer a fantastic service at a good price.