Attempt #2
The bypass I put in recently was from the Atomic 4 sitting in the garage at home waiting to be rebuilt. Problem was (for me) the valve on it was an old "gate valve" and it was tough to know how much was closed off etc. So last night re-plumbed with ball valve.
Soooo much nicer.
Now for a weekend of light air sailing huzzah!
by the by - the pic was taken just after I installed it... I know the valve is set to full bypass
AND ... the thermostat is most definitely out...