The adhesive joining of DELRIN acetal resin is generally limited to prototype parts with low shear forces. This is because the shear strength achieved with most adhesives is only 2 to 10 percent of the available shear strength of DELRIN. The best adhesion requires a special roughening step...
Try using 3D Actify program. Provides excellent viewing and measurement capabilities. They used to offer free 30 day use of program. Not sure if they still do...worth a try. www.actify.com
Good Luck
You may want to obtain a free book from Laird Plastics. It has much of the information you are asking. 800-610-1016. Also contact manufacturer of plastic and request their design or engineering guide. Note that nylon has high moisture absorption....could affect your clearances and thus...
Saint,
You could look at the Human Factors Design Handbook (McGraw Hill) Chapter 4. There are also computer programs that allow you to position the body and even import your CAD data. I'm familiar with Mannequin by HumanCAD but there are others. Hope this helps
Herb