I have a Brian Taylor 83" spitty with ZDZ 50cc and scale exhaust, 25lbs all up, and loving it. Mine used to have the ST 4500 and it was a little under powered for me, even running on a pump. I'm not a fan of Moki anymore, good power but are fuel hogs and leave oily messes. I used to have my Moki 210 inside a TF P51 and took it out after going to gassers for my warbirds. Just got tired of oily planes at the end of the day. Consider putting a DLE 55cc in it if the cowl can cover it.