[msimon785]

With regards to the BIMBA Cylinders, I CADed one manually and used derivative parts for any other cylinders we used. Most non-repairables are made of 4 parts, the rear cap, top cap, piston and body. The caps are standard with any length. For the Piston and Body, you can simply enter either a measured length or a calculated length. From that point, if you use Inventor, make the assembly flexible. This allows the cylinder to be viewed in multiple positions as a subassembly. In other words, you can extend/contract it without opening up the part.
If you would like my .ipt's for BIMBA non-repairables, I'd be happy to let you have them.
Good Luck!