i'm assuming your talking about the PTF model P51? I met someone recently who had flown that plane with the PTF. He said that even with the "trainer" add-ons (like the wing covering and "wheel cover flaps") it was still a FAST plane that was pretty spooky to fly just b/c of it's speed. <<< all of these devices are supposed to slow the plane down.....>>>. He liked it alot overall, but that it was really FAST and it too him quite a few days to get used to it; then he pulled the "training wheels off" - for ONE run [X(] it scared the living crap out of him and he decided that he needed more practice [sm=confused_smile.gif]

If it's not the PTF system and it's the "standard" P51, you've still mounted a pretty wicked little toy to the front of your plane, that Saito 100 4-Stroke is also a VERY fast engine too! If your goal was to build a race plane or just something that moves like a hummingbird on crystal meth, you've achieved your goal

I'd go ahead and get extra plugs, a few extra pairs of wings, extra repair items, etc... they're going to come in handy. Also, get a "field tool box kit" -Tower has them for ~$125-$150; there are alot more field toys you need with "fuel based" engines and besides the fuel; glow engines/4 stroke have ALOT of freaking chargers associated with them!
(1) charger (wall socket, 110V) for Tx + Rx/flight battery charging discharging;
(2) 12V deep cycle gell battery for the glow plug, electric fuel pump (oh, don't forget that too; or a manual one), and the starter -this is the "field battery" for the "starter" and "plug heater" (aka "Chicken bone"- It spins starts your engine Fingers don't grow back and I don't think Tower Hobbies sells them either )
(3) charger (wall socket, 110V) to charge the 12V deep cycle battery. Extra flight batteries are nice to have too!

I'm sure there are a couple of things that I'm forgetting since it's 300am here....

And someone who will walk you through the engine break-in period for the 4 stroke engine, you'll need a tachometer to check the rpm during the break in so it won't run rich or lean and SERIOUSLY damage the engine. You REALLY need guidance -as in "at your side"- on how to do this right. I've read a few manuals on 4 stroke engines and they real powerhouses but they're also a WHOLE lot more complex and you can booger one up BAD real quick!

You're going to be running 90 with your hair on fire during your first few run. I'm positively GREEN with envy [:'(]