diff --git a/nmeamux/root/usr/bin/nmeamux b/nmeamux/root/usr/bin/nmeamux
index 5278dde..79be8d5 100755
--- a/nmeamux/root/usr/bin/nmeamux
+++ b/nmeamux/root/usr/bin/nmeamux
@@ -12,6 +12,7 @@ require "stdlib" .include { "seq", "list" }
 require "posix"
 require "socket"
 require "Class"
+require "trace"
 local NIL = Class.NIL
 local list = _G.list
 
@@ -35,7 +36,7 @@ local DutyCycle = Class(nil, "DutyCycle", {
 
 function DutyCycle.new(class, port, pfx)
    local now = getMsecs()
-   return class:_new { mPort = port, mPrefix = pfx , mTail = tnew{}, mLastLog = now }
+   return class:_new():_merge { mPort = port, mPrefix = pfx , mTail = tnew{}, mLastLog = now }
 end
 
 ---
@@ -45,7 +46,7 @@ function DutyCycle:add(str)
    local start = now - math.floor(self.mInterval * 1000)
    local tail = self.mTail
    while #tail > 0 and tail[#tail].t < start  do tail:remove() end
-   self.mTail:insert(1, {t = now, s = str:sub(1,5), l = #str})
+   self.mTail:insert(1, {t = now, s = str:sub(1,6), l = #str})
 
    if self.mLastLog < start then
       local sum, sums = 0, {}
@@ -55,7 +56,7 @@ function DutyCycle:add(str)
       end
       local names = List(seq.all_keys(sums)):sort()
       log.notice(("PORT:%-12s %s:%3d%% %3d %s"):_(self.mPort.mName, self.mPrefix,
-         idiv(self.mPort.mSpeed * 10, sum), sum,
+         idiv(sum * 1000, self.mPort.mSpeed), sum,
          List(seq.map(|n|("%s:%d"):_(n, sums[n]), list.iter(names))):concat(",")))
       self.mLastLog = now
    end
@@ -134,8 +135,8 @@ end
 ---
 -- Startup system interaction
 function NmeaNode:start(str)
-   for _,s in ipairs(self.mInputs or {}) do
-      assert(nodes[s], ("No input: %s"):_(s)):addSink(self)
+   for ix,s in ipairs(self.mInputs or {}) do
+      assert(nodes[s], ("No input: %s"):_(s)):addSink(self, ix)
    end
    if not self.mPortNo then return end
 
@@ -188,7 +189,7 @@ end
 -- Startup system interaction
 function NmeaOutput:start(str)
    NmeaOutput:getSuper().start(self, str)
-   self:addSink(nodes[self.mOutput])
+   self:addSink(nodes[self.mOutput], 1)
 end
 
 --------------------------------------------------------------------
@@ -299,7 +300,7 @@ end
 -- Data forwarding
 function NmeaPort:processInput(str)
    self.mDutyOut:add(str)
-   log.notice(||("OUTP:%-12s W: %t"):_(self.mName, str))
+   log.debug(||("OUTP:%-12s W: %t"):_(self.mName, str))
    posix.write(self.mSerialPort:getfd(), str.."\r\n")
    -- if self.mLineBuffer then sysmon:addOut(self, str:sub(1,6)) end
 end
@@ -382,7 +383,7 @@ end
 function NmeaFilter:passItOn(str, ix)
    if self.mPrioTout then
       local now = getMsecs()
-      local stmt = str:sub(1,5)
+      local stmt = str:sub(1,6)
       local old = self.mPrioList[stmt]
       if old and (now - old.timeStamp) < self.mPrioTout and old.prio < ix then
          log.debug(||("TREJ:%-12s READ: %t"):_(self.mName, str))
@@ -565,6 +566,7 @@ local function runGC()
 end
 
 local function main(args)
+   --trace.on()
    local conf = getConf() or testConf or sampleConf
    configure(conf)
    startMonitor(117)
@@ -573,7 +575,11 @@ local function main(args)
    if not log.debug() and args[1] and args[1] == "trace" then
       local traceLog = log.create("nmeamux-trace.log", 0, false, 8000)
       log.debugonly = function() end
-      log.debug = function(str) if not str then return false end return traceLog:log(str) end
+      log.debug = function(str)
+         if not str then return false end
+         if type(str) == "function" then str = str() end
+         return traceLog:log(str)
+      end
    else
       log.debugonly = log.debug
    end