I'm using my buddies Carvin rig for practice with my Country band right now. R1000 I think, with a 4x10 and 1x15. It's in the normal 4x10 on top way right now, but I'm gonna try the 15 on top soon to see how that works. Since the cab is biampable I'm going to start putting the highs to the 15 on top since the 4x10s can handle a crap ton more lows then the 15.
There is a little problem I see, but it depends on the cab specifics.
If the 115 has no horn the higher frequencies will tend to 'beam' due to the cone size:
http://barefacedbass.com/technical-information/speaker-size-frequency-response.htm
"And thirdly, the bigger the size of the source, the less wide the dispersion of sound."
It shouldn't be an issue, but you will find out if you can't hear adequately when you are off axis to the speaker. if the 115 has a horn you might be golden.
There is an inherent design flaw with cone arrays... the 410, with a 2x2 formation, has a polar response patten that
can result in terribly uneven sound throughout the room...
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So depending on the cabs, and the tone you're running (scooped, mid rich etc...) you could have some issues. But it could always just be the room
I'm no acoustic engineer, I hope the inversion works great.... if the 410 can deliver the goods and the 115 handles the high mids and treble...
You'll figure it out when you try it! (sorry if I'm going nuts on the docs, your suggestion got me thinking.... I could have it arseways of course!)