Jim,

When I built my original backplate V-weight mold I used plasticene clay
to form the cavity. Using this method I was able to contour the shape of
the weight to the curvature of the tank and in so doing obtain a
slightly larger volume of ballast metal.

After forming the positive I mixed up a displosable aluminum turkey
broiler pan of plaster of Paris and pressed the clay weight shape into
the liquid plaster until it set. The clay fell right out of the plaster
mold and it was ready to use the next day.  I have molded a fair number
of weights and still continue to  use this cavity mold.  I have been
able to obtain upwards of 8 lbs with this method. In my case I melt the
lead in  a cast iron frying pan on a single burner hot plate assisted
with a bernz-o-matic torch.

Bill
Jim Cobb wrote:
> 
> Dave-
> 
> Well the one that I made was 7lbs, I was thinking that you could screw in
> a couple of 1.5" wood dowels over the mounting holes and move the putty
> further out towards the ends. The lead would flow around the dowels and
> you could make a weight which could span the whole length of the
> backplate, maybe get up to 10lbs or so.
> 
>   Jim
> 
> On 1/5/98 12:00 PM David Shimell (shimell) wrote:
> 
> >
> >Jim
> >
> >Good idea - what is the maximum weight you think you can get in a
> >P-weight?
> >
> >Dave
> >
> 
>  -------------------------------------------------------------------
>  Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html
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