Hey guys...I'd really appreciate all input. Right now, it's approximately 2:15am EST. I have Church in the morning, and would like to break-in the engine tomorrow and possibly fly it tomorrow afternoon or COMPLETELY ready to fly for next Saturday. My question is, can I break-in the Saito 100 with an APC 15x4W prop without any ill effects? I mean, as long as the needle's 5 turns out and it turns 4000rpm for 10 minutes shouldn't it be fine? Hobbsy said he used a method of increasing 1000RPM for every run, so 10min's at 4000, 5000, 6000 and 7000RPM's before leaning for peak. Would that be okay with the 15x4W?? Thanks, all help is WAY appreciated!!!!