Peter Aawen, I'm thoroughly enjoying your comments and trashing of my excuses. Just what I need to stop dithering...almost.
What are the air box mods required of the Stage 2?
I like the idea of being able to select 'modes' as with the Dynojet, and being able to use lower octane fuels when the 91 isn't available00 (which is often the case in the rural areas of the West). Control is good, to my way of thinking.
So, any thoughts on Stage 2 vs Dynojet?
My ECU Upgrade from Rotax Racing did entail removing the restrictive air box & swapping in a better air filter too, plus a cat delete, and improving the secondary muffler, but then it isn't necessarily as limited as Monster's Stages 1 or 2, and yet I can still use lower octane fuel if that's all that's available - and there's
vast areas of this Country where I frequently go traveling that are so afflicted! :lecturef_smilie:
The engine still runs fine on the lower octane juice, but I was briefed about it and so am very aware that it
truly IS a high compression, high performance motor that behaves at its best when fed on higher octane gas.... so if I have no choice but to use it I simply don't push it as hard when running on the lesser stuff here, 91 RON, as I can & do on our 95 RON (which is my usual choice over the lower 91 or higher 98 RON - the high stuff I really only ever run on the track, it's that much more expensive & just not such a big enough improvement as to warrant running it anywhere else!

) So yeah, outright performance does take a little hit & I don't get quite the best fuel economy either, cos it too takes a hit as the octane drops, but those hits really only bring it back closer towards into line with the stock motor's performance & fuel economy anyway, so I haven't really 'lost' too much, especially considering that those wide open spaces aren't really all that conducive to exploring the limits of engine performance, Spyder handling, & Ryder skill anyway! :banghead:
As for the control you think a DynoJet will bring you, I've got all that & then some courtesy of my brain and my right hand & wrist, despite the numerous surgeries on both...

. I can be happily tooling along achieving the best that Economy can offer, then at the merest whim I can switch to full on Sport Plus mode or anywhere in between, all
far faster than anyone can fumble around changing their settings on a control or via an app! And there's never any need to turn it off or disconnect & remove it for servicing or anything either! It's virtually indetectable, even to people searching for it; it's never going to be accidentally lost or over-written; and even the most discerning of Spyder Techs have been unable to find &/or say anything but that my Spyder is far & away the best performing Spyder they've ever seen/worked on, and that's even
with the raised Red Line/Rev Limit! All within the 'known safe parameters' of this engine as run in other platforms too!

hyea:
Why anyone would bother with anything less than this, like with a Power Commander of a DynoJet is really beyond me - my ECU Upgrade has made my Spyder the bike it
SHOULD have been from the outset, and it's an absolute joy to ryde at any time, whatever the conditions! It does what I want when I want it to, and it's got the legs for touring Oz without breaking the bank, even if I do decide to enjoy punting it thru the twisties every now & then, scaring all the mortals on their puny machines when I do! :roflblack:
Go on, Get the Damn ECU Upgrade! 
. You know you're going to eventually, or you'll be asking yourself why you bloody well didn't until you eventually shuffle off this mortal coil, a disappointed & bitter shadow of the man you
could have been but for the will to commit to something you clearly want!! !

pps: