Here is a picture of a Mini Curare that I acquired from an estate sale. Apparently the plane was built but never had a radio installed. It had a OS .25 FSR installed as well a the cutest mechanical retracts. I bench tested the OS vs. my K&B .21 and the .21 had mor e power with the props I expected to run APC 8x5, 8x6. Then I installed a rear header and a Magic Muffler that is imported from Australia.
Then i spent some time installing high end JR mini servos and am pretty happy with how the upgrade turned out.
final weight is 3 pound 6 OZ! It flys great and I am in the process of getting her sorted out. The light weigh makes the landings a no brainer.
The pipe is peakier than I expected and will take a few more flight to get it running at max power.
Sparky