Hi Rod, 
Did you ever get your low power issue resolved?
I have finally gotten around to getting my UBITX V3 board done and on the air and I find the same issue as you have described here on this thread. 
about 3 Watt's is about all I can get out and that is on 20 Meters when driving the Mosfet's to about 125MA Bias. 

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You can email me back direct bret.wx7y@... if you like.
thanks and 73's
Bret
WX7Y