diff --git a/.cli.env b/.cli.env
index 5595c4e..dc5a4c1 100644
--- a/.cli.env
+++ b/.cli.env
@@ -2,7 +2,7 @@
 CIRCOMKIT_COMPILER_ARGS="-l ./node_modules --r1cs --wasm --sym"
 
 # proof system to be used, can be: groth16 | plonk | fflonk
-CIRCOMKIT_PROOF_SYSTEM="plonk"
+CIRCOMKIT_PROOF_SYSTEM="groth16"
 
 # solidity contract export path
 CIRCOMKIT_SOLIDITY_PATH="./contracts"
diff --git a/circuits/main/multiplier_3.circom b/circuits/main/multiplier_3.circom
new file mode 100644
index 0000000..a8559aa
--- /dev/null
+++ b/circuits/main/multiplier_3.circom
@@ -0,0 +1,6 @@
+// auto-generated by instantiate.js
+pragma circom 2.0.0;
+
+include "../multiplier.circom";
+
+component main = Multiplier(3);
diff --git a/package.json b/package.json
index 4526c6a..faebda6 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "circomkit",
   "version": "0.0.1",
   "description": "A Circom development environment",
+  "author": "erhant",
   "license": "MIT",
   "engines": {
     "node": ">=10.4.0"
@@ -24,7 +25,6 @@
     "format": "npx prettier --check ./**/*.ts",
     "lint": "npx gts lint"
   },
-  "author": "erhant",
   "devDependencies": {
     "@types/chai": "^4.3.4",
     "@types/ejs": "^3.1.2",
diff --git a/scripts/functions/calldata.sh b/scripts/functions/calldata.sh
old mode 100644
new mode 100755
diff --git a/scripts/functions/setup.sh b/scripts/functions/setup.sh
index ceb2a1d..ebfde16 100755
--- a/scripts/functions/setup.sh
+++ b/scripts/functions/setup.sh
@@ -1,4 +1,4 @@
-## Commence a circuit-specific phase-2 powers-of-tau ceremony
+## Commence a circuit-specific setup
 setup() {
   echo -e "\n${CIRCOMKIT_COLOR_TITLE}=== Circuit Setup ($CIRCOMKIT_PROOF_SYSTEM) ===${CIRCOMKIT_COLOR_RESET}"
   local CIRCUIT=$1                                    # circuit name
@@ -10,7 +10,7 @@ setup() {
 
   # check if P1_PTAU exists
   if [ ! -f "$P1_PTAU" ]; then
-    echo -e "${CIRCOMKIT_COLOR_ERR}${P1_PTAU} does not exist.${CIRCOMKIT_COLOR_RESET}"
+    echo -e "PTAU file ${CIRCOMKIT_COLOR_ERR}${P1_PTAU} does not exist.${CIRCOMKIT_COLOR_RESET}"
     exit 1
   fi