Sounds, great Jack . . I have only flown a glow version with OS55AX, and it was awesome. Very strong vertical . . . . almost over powered at 2.4kg (5 1/4lb).
How many Watts static is the current set-up ? I am expecting my set-up will be propped to a about 1000W. This system flew my 3kg (6.6lb) Katana Freestyle vertical without issue.
I will be using 3700mAh 5S1P . . at 430gms/pack it should be a "little lighter on the wing".
I want to use it as a pattern practice plane. The '09 schedules are shorter now, so it should be no problem.
The Impact ?? 140RX glow . .
I have an Integral (in the box) as well . . and I am not sure how to power it. Was thinking about YS170 but it is very narrow in the nose. Electric?? have been thinking about that too

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JB