what's the fixture for? what machines will it be used in? is it for one part of for multiple at once? does it have to last a long time for a longer production period, or is it meant to be used just a few times? will it all be one operation, or will it be two or more different operations of the same part at the same time?
there's a lot more information needed on this, so if you'd be so kind to include as much information as possible, we can start to help you on this.