badly behaving jscad file

gistfile1.txt

function getParameterDefinitions(){
		return [
			{
				"name" : "showBuildPlate"
				,"type" : "choice"
				,"values" : [
					"none"
					,"ToM"
				]
				,"initial" : "none"
				,"caption" : "Show build plate"
			}
			,{
				"name" : "part"
				,"type" : "choice"
				,"values" : [
					"dremelFork"
					,"upright"
				]
				,"initial" : "dremelFork"
				,"caption" : "part type"
			}

			,{
				"name" : "maxDremelDiameter"
				,"type" : "float"
				,"initial" : 52
				,"caption" : "maximum dremel diameter"
			}
			,{
				"name" : "forkHolderDiameter"
				,"type" : "float"
				,"initial" : 6.25 * 2
				,"caption" : "diameter of fork torus"
			}
			,{
				"name" : "forkAxisHeight"
				,"type" : "float"
				,"initial" : 20
				,"caption" : "canister diameter"
			}
			,{
				"name" : "forkBoltDiameter"
				,"type" : "float"
				,"initial" : 5/16 * 25.4 * 1.03
				,"caption" : "Diameter of fork bolt"
			}
			,{
				"name" : "forkBoltWall"
				,"type" : "float"
				,"initial" : 3 
				,"caption" : "Diameter of fork bolt"
			}


		];

}


function main(params){
	var ret = [];
	if("dremelFork" == params.part){
		var cubeThickness = params.forkBoltDiameter + params.forkBoltWall * 2;

		var base = union(
			torus({
				"ri" : params.forkHolderDiameter / 2
				,"ro" : (params.forkHolderDiameter + params.maxDremelDiameter) / 2
				,"fni" : params.forkHolderDiameter * 2
				,"fno" : (params.forkHolderDiameter + params.maxDremelDiameter) * 2
			})
			,CSG.cube({
				"center" : [
					-(params.forkHolderDiameter + params.maxDremelDiameter) / 2 - params.forkAxisHeight / 2,
					0,
					cubeThickness / 2
				]
				,"radius" : [params.forkAxisHeight / 2, cubeThickness / 2, cubeThickness / 2]
			}).subtract(
				rotate(-45, [0, 1, 0], CSG.cylinder({
					"start" : [0, 0, -100]
					,"end" : [0, 0, 100]
					,"radius" : params.maxDremelDiameter / 2
					,"resolution" : 2 * params.maxDremelDiameter
				})).translate([params.forkHolderDiameter, 0 ,0])
			)

		);

		var holes = union(
			CSG.cube({
				"center" : [100, 0, 0]
				,"radius" : [100, 100, 100]
			})
			,CSG.cube({
				"center" : [0, 0, -100]
				,"radius" : [100, 100, 100]
			})
			,CSG.cylinder({
				"start" : [100, 0, cubeThickness / 2]
				,"end" : [-100, 0, cubeThickness / 2]
				,"radius" : params.forkBoltDiameter / 2
				,"resolution" : 2 * params.forkBoltDiameter
			})
		);
		ret =[base.subtract(holes).center([true, true, false])];
	}

	if(params.showBuildPlate == "ToM")
		ret.push(CAG.rectangle({"radius" : [60, 60]}));

	return ret;
}