Building a custom test fixture

Dear freinds
Did any one has some experience in buildin a custom TEST FIXTURE in order to measure som passive and active components using a vector network analyzer ?

I've built some, using low cost FR4 with TRL cal kits.
How can I help you?
Mazz

thank you for your reply
Please can you sned me som notes or paper in order to build a kit ?
again tnx:D