diff --git a/brick/scripts/img.js b/brick/scripts/img.js
index e1517cb8..50036f89 100644
--- a/brick/scripts/img.js
+++ b/brick/scripts/img.js
@@ -16,8 +16,9 @@ function build() {
     bootnews += " "
 
   let cr = fs.readFileSync("cram.bin")
-  if (cr.length > 10878976) {
-    console.log("too big")
+
+  if (cr.length > 10485760) {
+    console.log("too big by " + (cr.length - 10485760))
     return
   }
   let img = fs.readFileSync("EV3 Firmware V1.09D.bin")
diff --git a/brick/scripts/mkimg b/brick/scripts/mkimg
index b4377b8b..451712ae 100755
--- a/brick/scripts/mkimg
+++ b/brick/scripts/mkimg
@@ -1,6 +1,9 @@
 #!/bin/sh
 # dd if=EV3\ Firmware\ V1.09D.bin of=orig.cram bs=65536 skip=37 count=400
 
+sudo cp linux/pxt/uf2daemon/server dev-ev3/home/root/lms2012/sys/uf2d
+sudo cp linux/pxt/kernel/d_usbdev.ko dev-ev3/home/root/lms2012/sys/mod/d_usbdev.ko
+sudo chown -R root:root dev-ev3/home/root/lms2012
 sudo mkfs.cramfs dev-ev3 cram.bin
 node img
 ls -l firmware.bin