Victory mc footboard Round 1-Mockup & Fixtures

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Victory mc footboard Round 1-Mockup & Fixtures                    Steel mockup--Creating Datum References    Meanwhile--- Have plating shop strip the chrome plating off the stock aluminum castings.   1-A cast steel foot peg mount with the foot peg removed was attached to the original tapped mount holes in the bike’s frame. The owner and owner’s wife (the pax), were seated on the bike, to determine a comfortable, ergometric location of the revised foot board mount.    A piece of angle iron was positioned, tacked, then welded in place to simulate:    - the top of the footboard and inner edge    -the end or forward location of the footboard, which was pitched up slightly, then toed out and cambered to suit the pax.                    This steel mockup was then fastened to the mockup fixture, to get angularity readings, in order to duplicate these when modifying the cast aluminum mounts in the symmetry fixture.                                                                                                                     Using an adjustable bubble level and protractor on the steel mockup in its fixture, gave these readings:                -the caster angle of the footboard relative to the ground or horizontal—it’s 1.5 degrees pitched uP.    -the toe-out angle of the foot board—12 degrees relative to the 2 bolt mounting faces, which was ergometric for the pax    -pax comfort indicated that the footboard would be cambered 6 degrees-negative, relative to the 2 bolt mounting faceshttp://www.weldingweb.com/attachment...1&d=1198294555Below is shown the 12 degree toe-out angle of the steel mockup.http://www.weldingweb.com/attachment...1&d=1198294652Now I had the mockup, but I needed a way to be able to accurately measure and duplicate, theabove basic measurements and relative dimensions from the mockup to the aluminum cast mounts.This was done by creating a separate mockup fixture and the symmetry fixture. All 3 plates were cut to same length, the mounting holes transferred from the steel mount to thesteel mockup plate, then drilled. When the aluminum mounts are fastened to the symmetry fixture, they will be in an identical position to the steel mockup mount in its mockup fixture.The mounting holes were tapped for 5/16 and 3/8 coarse thread, inch--since the major diameter of these inch threads, fit snuggly in the casting holes. (Metric fasteners are used for attachment) Both fixtures were then accurately tacked up.I used these very snug fitting, inch bolts to help hold position of the castings in the fixtures.With these 2 fixtures, I now had an accurate way to make a right and left side mount,position and measure whatever I planned to do. The mounts by themselves, had no good reference surfaces to use—except for the machined flat underside of the bolt holes and the bolt holes themselves.I was not about to attempt a cut, fit, tack, put on the bike and see what it looks like.....job. I only had one set of custom Rivco castings to make one set of finished mounts. Guess ‘wrong’ on modifying these castings, and the job goes south.Additionally via the fixtures, I could tell if I was getting weld pulling, etc.; during fitup.At this point I was ready to fiddle with a side plate template.Steel mockup fixture and symmetry fixtures, below:http://www.weldingweb.com/attachment...1&d=1198294762Symmetry Fixture below, showing red cut lines:http://www.weldingweb.com/attachment...1&d=1198294827Round 2 to follow in separate post Attached ImagesBlackbird