Eighty-some views and no other replies. These guys must be sleep surfing thru the threads

IMHO jets are no different than any other airplane when talking about thrust to weight and wing loading. Lighter is better and the more thrust to weight you can get the better.
I think the MAX weight you would want to try to fly with the Wren/JDE 54 or a Dynamax/91 would be about 18 lbs wet.

My personal rule of thumb for thrust to weight is 0.75 min wet.
So at 12 lbs engine thrust max aircraft weight would be about 16 lbs wet.

Im sure some other more experienced flyers could offer some actual numbers on different kits/models.

Cheers,
James