i also am using a saito 100 with an APC 14x8. have not flown it yet as too much snow on the field, but have ran 2 tanks thru it chained to a post... chad, i have a spacewalker ARF 91 surpass, and an avistart w/40fx... not any issues flying the spacewalker, but there is a big difference between it and the p51. I am planning on flying a lot prior to the maiden on the mustang..