basinbum, i built and flew an original cermark pitts (i like the red and white scale look better anyway) for three seasons and just sold it to a guy in texas and he is enjoying it now. Mine had a Saito 180 in it so i beefed it up a bit. What i believe are nessasary mods reguardless are: cover the cabanes with glass and repaint, strengthen the wing saddle area with light ply on the inside, remove the dowel it the wing and replace with a longer one (you won't believe how short it is), epoxy the gear mount area, glass the fire wall (i replaced the engine mount and strengthened the fire wall), replace the stock tail wheel assembly. In addition i moved the elevator servos to the rear, made new end srtuts and new pushrods for the top ailerons, and put solid flying wires on the tail. This all seams like alot, but it is worth it. Even after all this she is still light and agil. This plane flys and looks just great! I only sold her to help finance my bigger stuff this year. You can go to my old ad and see some of the mods. I know your question wasn't addressed to me but i do have a couple hundred flights on this type so i hope this helps. Don't know what's in the one you have, but if it's got the power, and stregthened a little, she will really amaze you and the crowd.