diff --git a/case/48ish_case.scad b/case/48ish_case.scad
index 48723b7..c475bc7 100644
--- a/case/48ish_case.scad
+++ b/case/48ish_case.scad
@@ -29,6 +29,14 @@ module shell () {
 }
 
 module standoffs () {
+	// for M2 3x3 standoffs
+	hole_diameter = 3;
+	hole_depth = 3 * 1.5;
+	wall_thickness = 1;
+
+	// offsets the top of the standoffs down from where the pcb will actually rest; this allows the screws to actually hold the pcb down against the outer lip of the case and prevent rattling if the pcb is not perfectly flat
+	standoff_top_face_offset = -0.25;
+
 	for (point = [
 		[17 + 18 * 0, 16.5 + 17 * 0],
 		[17 + 18 * 2, 16.5 + 17 * 2],
@@ -38,9 +46,9 @@ module standoffs () {
 		[17 + 18 * 8, 16.5 + 17 * 2],
 		[17 + 18 * 10, 16.5 + 17 * 0],
 	]) {
-		translate([point.x, point.y, baseplate_thickness - 0.1]) difference() {
-			cylinder(h = inner_clearance + .1, d = 5);
-			translate([0, 0, inner_clearance + .1 - 3 * 1.5]) cylinder(h = 3 * 1.5 + .2, d = 3); // hole inner - adjust for insert size
+		translate([point.x, point.y, baseplate_thickness - 0.01]) difference() {
+			cylinder(h = inner_clearance + standoff_top_face_offset + .01, d = hole_diameter + 2*wall_thickness);
+			translate([0, 0, inner_clearance + standoff_top_face_offset + .1 - hole_depth]) cylinder(h = hole_depth + .02, d = hole_diameter); // hole inner - adjust for insert size
 		}
 	}
 }