diff --git a/README.md b/README.md
index 9457ffcd..b2d1f853 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,8 @@
 
 *Rack* is the engine for the VCV open-source virtual modular synthesizer.
 
-For information about the software, go to the [VCV website](https://vcvrack.com/) or the [VCV Rack manual](https://vcvrack.com/manual/).
+- [VCV website](https://vcvrack.com/)
+- [Manual](https://vcvrack.com/manual/index.html)
+- [Building](https://vcvrack.com/manual/Building.html)
+- [Communities](https://vcvrack.com/manual/Communities.html)
+- [Licenses](LICENSE.md)
diff --git a/include/helpers.hpp b/include/helpers.hpp
index 470fce4a..b715ca29 100644
--- a/include/helpers.hpp
+++ b/include/helpers.hpp
@@ -17,7 +17,7 @@ namespace rack {
 
 
 template <class TModule, class TModuleWidget, typename... Tags>
-plugin::Model *createModel(std::string slug) {
+plugin::Model *createModel(const std::string &slug) {
 	struct TModel : plugin::Model {
 		engine::Module *createModule() override {
 			TModule *m = new TModule;
diff --git a/include/simd/vector.hpp b/include/simd/vector.hpp
index 6f980ea8..ac66bec9 100644
--- a/include/simd/vector.hpp
+++ b/include/simd/vector.hpp
@@ -48,32 +48,41 @@ struct Vector;
 */
 template <>
 struct Vector<float, 4> {
-	__m128 v;
+	union {
+		__m128 v;
+		float f[4];
+	};
 
 	/** Constructs an uninitialized vector. */
-	Vector<float, 4>() {}
+	Vector() {}
 
 	/** Constructs a vector from a native `__m128` type. */
-	Vector<float, 4>(__m128 v) : v(v) {}
+	Vector(__m128 v) : v(v) {}
 
 	/** Constructs a vector with all elements set to `x`. */
-	Vector<float, 4>(float x) {
+	Vector(float x) {
 		v = _mm_set_ps1(x);
 	}
 
 	/** Constructs a vector from four values. */
-	Vector<float, 4>(float x1, float x2, float x3, float x4) {
+	Vector(float x1, float x2, float x3, float x4) {
 		v = _mm_set_ps(x1, x2, x3, x4);
 	}
 
 	/** Returns a vector initialized to zero. */
-	static Vector<float, 4> zero() {
-		return Vector<float, 4>(_mm_setzero_ps());
+	static Vector zero() {
+		return Vector(_mm_setzero_ps());
+	}
+
+	/** Returns a vector with all 1 bits. */
+	static Vector mask() {
+		__m128 zero = _mm_setzero_ps();
+		return Vector(_mm_cmpeq_ps(zero, zero));
 	}
 
 	/** Reads an array of 4 values. */
-	static Vector<float, 4> load(const float *x) {
-		return Vector<float, 4>(_mm_loadu_ps(x));
+	static Vector load(const float *x) {
+		return Vector(_mm_loadu_ps(x));
 	}
 
 	/** Writes an array of 4 values. */
@@ -178,9 +187,7 @@ inline float_4 operator--(float_4 &a, int) {
 
 /** `~a` */
 inline float_4 operator~(const float_4 &a) {
-	float_4 mask = float_4::zero();
-	mask = (mask == mask);
-	return a ^ mask;
+	return a ^ float_4::mask();
 }
 
 
diff --git a/src/plugin/Plugin.cpp b/src/plugin/Plugin.cpp
index 98a9c53b..e7da130f 100644
--- a/src/plugin/Plugin.cpp
+++ b/src/plugin/Plugin.cpp
@@ -1,5 +1,6 @@
 #include <plugin/Plugin.hpp>
 #include <plugin/Model.hpp>
+#include <plugin.hpp>
 
 
 namespace rack {
@@ -13,6 +14,7 @@ Plugin::~Plugin() {
 }
 
 void Plugin::addModel(Model *model) {
+	assert(isSlugValid(model->slug));
 	assert(!model->plugin);
 	model->plugin = this;
 	models.push_back(model);