I know 2 people who cast platinum with
a Neycraft centrifugal caster.
Now you know 3 people who cast PT with a Neycraft. But there are some mods that are necessary to success.
First off you need a big touch and an O2 regulator that can go to 70psi. Then there there is the Gaab crucible holer #705-106 to hold a Wesgo crucible type A. Got it from Rio Grande years ago but don't see it now. Lastly and most importantly is zircon paint from Gesswein. Due to high heat to melt, silica crucible breaks down and contaminates PT. So I air brush a new coat of Z-O paint after each casting. Also keep 2-3 crucibles freshly painted. Thanks to another CA jeweler from Gemvision forum who shared this.
PS Learned my casting tech from Revere Academy and it has served me well