Sorry -this should help! Just cut and paste the source code into CURA (with the open,SCAD plugin)
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//axle securing block
//smemotormount
difference()
{
cube([33,20,7]);
{
translate([0,0,3.5])
{
rotate([0,90,0])
{
cylinder(40,3.5,3.5);
}
}
}
}
//END
----------------------------------------------------------------------------------------------------------------
And the OU part
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//wonder engine SME motor mount
//12Tmod0.5 on motor
//90Tmod0.5 on wheel
//faceplate
difference()
{
cylinder(3,17,17);
{
cylinder(4,5,5);
translate([7,0,0])
{
cylinder(4,2,2);
}
translate([-7,0,0])
{
cylinder(4,2,2);
}
translate([0,7,0])
{
cylinder(4,1.5,1.5);
}
translate([0,-7,0])
{
cylinder(4,1.5,1.5);
}
}
}
//holding tube
translate([0,0,3])
{
difference()
{
cylinder(30,17,17);
translate([0,0,3])
{
cylinder(34,14,14);
}
}
}
//axle U
difference()
{
translate([25.5,0,0])
{
cylinder(33,11,11);
}
{
translate([25.5,0,-2])
{
cylinder(40,3.5,3.5);
}
translate([22,0,-2])
{
cube([7,20,40]);
}
}
}
translate([29,0,0])
{
cube([5,15,33]);
}
translate([17,0,0])
{
cube([5,15,33]);
}
//damper fitting
difference()
{
translate([13,5,0])
{
cube([9,23,10]);
}
translate([18,22,-5])
{
cylinder(20,1.5,1.5);
}
}
//END
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The motor I use is 25mm dia and has a 2.3mm shaft. By altering the raw dimensions you can adapt this to fit any motor. The axle shaft can be either 6mm (a common hear bore) or 6.4mm (Slaters wheels). The 90TMOD0.5 gear is a perfect fit for a BR 3 feet 9 inches diesel wheel at 1:22.6.
regards
ralph